plateau of Central Mexico, see Figure 10. Zonal range: Upper Tropical
Life-zone (Lowery and Dalquest, 1951:537), parts of the Veracruz and
eastern Transverse Volcanic biotic provinces of Goldman and Moore
(1945:349). Occurs from near sea level at Boca del Rio, Veracruz, up to
5500 feet 3 km. SE Orizaba.
_Diagnosis._--Size medium to large for the species; ground color of
dorsum of paratypes near Olive Brown; darkest of specimens of this
subspecies examined (from Potrero Viejo, Veracruz) between Prouts Brown
and Mummy Brown; distal two-thirds of guard hairs of dorsum black,
proximal third dark gray to sooty; hairs of dorsum black-tipped having
subterminal band of Ochraceous-Tawny; sides paler (less of dark brown)
than dorsum; venter Deep Olive Buff to clay color, individual hairs pale
olive buff at tips, dark gray basally; region of throat and chin sooty
gray; ventralmost vibrissae white to base, other vibrissae black to
base; ears dark brown, sparsely haired; forefeet and hind feet
flesh-colored in palest specimens, sooty in darkest; tail pale brown,
slightly paler below than above; presphenoid only slightly constricted
towards midline; average and extreme external and cranial measurements
of 10 adults from Cerro Gordo, Veracruz, are as follows: total length,
118.9 (112-127); length of tail vertebrae, 45.1 (42-50); length of body,
74.0 (69-78); length of hind foot, 16.0 (16); length of ear from notch,
12.8 (12-13); occipitonasal length, 19.5 (19.0-20.0); zygomatic breadth,
10.3 (10.0-10.8); postpalatal length, 7.1 (6.7-7.5); least interorbital
breadth, 3.9 (3.7-4.0); length of incisive foramina, 4.4 (4.1-4.6);
length of rostrum, 6.9 (6.5-7.2); breadth of braincase, 9.5 (9.2-9.7);
depth of cranium, 7.1 (7.1-7.4); alveolar length of maxillary tooth-row,
3.3 (3.2-3.3); for photographs of skull, see Plate 1_a_, and Plate 3_a_.
_Comparisons._--For comparisons with _B. m. nigrescens_, see account of
that subspecies. From _B. m. pallidus_, _B. m. brunneus_ differs in:
dorsal, lateral, and facial coloration deeper reddish brown, more
melanins present; venter darker; buff gray rather than whitish buff to
gray as in paratypical series; vibrissae black rather than brownish to
white; tail sooty, less flesh-colored; forefeet and hind feet averaging
slightly grayer; most external and cranial dimensions averaging slightly
larger; nasals less attenuated; presphenoid less hour-glass shaped,
sides more nearly straight.
From _B. m. infernatis_, _B. m. brunneus_ differs in: side of face and
neck deep reddish-brown rather than yellowish-gray (the differences in
dorsal colorations are greater between _brunneus_ and _infernatis_ than
between _brunneus_ and _pallidus_); venter darker buff-gray; tail
brownish rather than flesh-colored; forefeet and hind feet average
slightly grayer; most external dimensions averaging slightly larger;
cranial dimensions nearly the same except length of incisive foramina,
which is smaller; presphenoid differs in much the same way as from
pallidus.
_Remarks_.--Specimens from Chichicaxtle, Puente Nacional, 3 km. W Boca
del Rio, 1 km. E. Mecayucan, and Rio Blanco (20 km. WNW Piedras Negras),
are all paler than the paratypical series and other specimens from
within the assigned range of _B. m. brunneus_. All these specimens from
the coastal plain average considerably paler than those from the front
range and slopes of the mountains. Specimens from Puente Nacional are
intermediate in color between paler, grayish brown, specimens from the
coastal plains and the darker, brown, specimens from the mountains. When
Allen and Chapman (1897:203) described _brunneus_, they did so on the
basis of the darker brown mice from the higher altitudes. The name,
_brunneus_, _sensu stricto_, could be restricted to those mice from the
higher altitudes of central Veracruz. However, when the mice of
intermediate color from Puente Nacional are considered, it seems best to
include the material from the coastal plain with _brunneus_. Crania from
the higher altitudes are slightly larger than, but not significantly
different from, crania of specimens from the coastal plains. Specimens
examined from the coastal plains resemble the darker series of _B. m.
pallidus_ to the west in central Mexico. But there is no evidence of
gene flow between the paler coastal specimens and _B. m. pallidus_ to
the west. In fact, these paler brown mice on the coastal plain grade in
color into the darker brown mice from the mountains. The paler mice from
the coast may be an incipient subspecies.
The type and paratypes seem to have faded somewhat since they were
described by Allen and Chapman (_loc. cit._) and by Osgood (1909:259).
However, the color of the paratypes and other specimens herein assigned
is the feature most useful for distinguishing _brunneus_ from all other
subspecies of _B. musculus_.
_Specimens examined._--Total 187 all from VERACRUZ, Republic of Mexico,
and distributed as follows: type locality, 4400 ft., 16[1] (including
the type), 6[2], 1[3]; _Cerro Gordo_, 1500 ft., 19; _Teocelo_
[= _Texolo_], 4500 ft., 1; _2 mi. NW Plan del Rio_, 1000 ft., 14[4];
_Plan del Rio_, 1000 ft., 2[5]; _Carrizal_, 4[2]; Chichicaxtle, 3[2];
_Puente Nacional_, 500 ft., 1[5], 2; _Santa Maria, near Mirador_, 1800 ft.,
10[2]; Boca del Rio, 10 ft., 1[5], 8; _Cordoba_ [= _Cordova_], 14[1];
_4 km. WNW Fortin_, 4; _Rio Atoyac, 8 km. NW Potrero_, 1; _2 km. N.
Paraje Nuevo_, 1700 ft., 9; _El Xuchil_, _1 mi. W. Paraje Nuevo_, 6[6];
Potrero Viejo, 1700 ft. 15; _Cautlapan_ [= _Ixtaczequitlan_], 4000 ft.,
16; _Micayucan_, 1; 3 km. SE Orizaba, 5500 ft., 3; Rio Blanco, 20 km.
WNW Piedras Negras, 400 ft, 7; _29 km. SE Cordoba, Presidio_, 15[4];
_3 km. N Presidio_, 1500 ft., 2; Presidio, 600 meters, 6[3].
_Marginal records._--VERACRUZ: type locality; Chichicaxtle; Boca del
Rio, 10 ft.; Rio Blanco, 20 km. WNW Piedras Negras, 400 ft; Presidio; 3
km. SE Orizaba, 5500 ft.
[1] American Museum of Natural History.
[2] U. S. Nat. Museum (Biol. Surv. Coll.).
[3] Chicago Natural History Museum.
[4] Univ. Michigan, Museum of Zoology.
[5] Texas A & M, Coop. Wildlife Res. Coll.
[6] Univ. Illinois, Mus. Nat. History.
=Baiomys musculus grisescens= Goldman
_Baiomys musculus griesescens_ Goldman, Proc. Biol. Soc. Washington,
45:121, July 30, 1932; Ellerman, The Families and Genera of Living
Rodents, 2:402, March 21, 1941; Poole and Schantz, Bull. U. S. Nat.
Mus., 178:259, March 6, 1942; Goodwin, Bull. Amer. Mus. Nat. Hist.,
79(2):160-161, May 29, 1942 (part); Miller and Kellogg, Bull. U. S.
Nat. Mus., 205:513, March 3, 1955 (part); Felten, Senck. Biol.,
39:136, August 30, 1958; Packard, Univ. Kansas Publs., Mus. Nat.
Hist., 9:401, December 19, 1958; Hall and Kelson, The Mammals of
North America, 2:661, March 31, 1959 (part).
_Type._--Adult female, skin and skull; No. 257083 U. S. Nat. Mus. (Biol.
Surv. Coll.); Comayabuela [= Comayaguela] just south of Tegucigalpa,
3100 feet, Honduras; obtained on March 6, 1932, by C. F. Underwood,
original number 838.
_Range._--Central to south-central Guatemala, east to south-central
Honduras. Zonal range: Lower parts of the Merendon Biotic Province of
Smith (1949:235). Occurs from 3200 feet at a place 1/2 mi. N and 1 mi. W
Salama, Guatemala, up to approximately 4500 feet at Monte Redondo,
Guatemala.
_Diagnosis._--Size medium to small for the species; general ground color
of dorsum between Olive Brown and Buffy Brown; distal fourth of
individual guard hairs of dorsum black-tipped, proximal three-fourths
gray, underfur black-tipped with subterminal band of Vinaceous-Buff,
gray basally; facial region below eye Olive-Buff to Deep Olive-Buff;
regions of flanks without black-tipped guard hairs, therefore, appearing
paler brownish-buff than dorsum; venter Pale Olive-Buff to whitish in
midline, hairs there white to base, laterally grayish basally; hairs in
region of throat and chin resemble those of underparts; forefeet and
hind feet flesh-colored with grayish suffusion; ears dusky brown; tail
almost unicolored, slightly darker brown above than below; coronoid
process less acutely falcate than in other subspecies; zygoma bowed.
Average and extreme external and cranial measurements of 14 adults from
La Piedra de Jesus Sabana Grande, Honduras, are as follows: Total
length, 110.7 (100-123); length of tail vertebrae, 44.0 (32-55); length
of body, 66.7 (60-70); length of hind foot, 14.1 (12-15); length of ear
from notch, 11.8 (10-13); occipitonasal length, 19.3 (18.9-19.8);
zygomatic breadth, 10.1 (9.8-10.4); postpalatal length, 6.8 (6.2-7.3);
least interorbital breadth, 3.9 (3.8-4.1); length of incisive foramina,
4.3 (4.0-4.5); length of rostrum, 6.9 (6.6-7.2); breadth of braincase,
9.6 (9.2-10.1); depth of cranium, 7.0 (6.8-7.3); alveolar length of
maxillary tooth-row, 3.2 (3.0-3.4); for photographs of skull, see Plate
1_b_, and Plate 3_b_.
_Comparisons._--For comparisons with _B. m. pullus_ and _B. m.
handleyi_, see accounts of those subspecies. From _B. m. nigrescens_,
_B. m. grisescens_ differs in: dorsum less blackish (dark brown to
buffy); face buffy below eye rather than brownish-black; venter buffy to
whitish in midline, not sooty gray; forefeet and hind feet flesh-colored
with gray overtones, not dusky to sooty; zygoma bowed, sides less
parallel; braincase and bony palate slightly broader.
_Remarks._--Goodwin (1942:160) mentioned that a specimen from the type
locality of _grisescens_ was as dark as specimens of _B. m. nigrescens_
from Guatemala. However, all specimens from Guatemala, other than those
from Sacapulas, were referred by Goodwin (1934:40) to _B. m.
nigrescens_. My studies reveal a grayish-brown population in central
Honduras near to and including the type locality. This population
appears to grade into a slightly paler, particularly as concerns color
of hind foot and tail, group of Guatemalan mice from 1 mi. S Rabinal,
from 1/2 mi. N, 1 mi. E Salama, and from Lake Atescatempa. Specimens
from western Guatemala at Nenton and Jacaltenango, on the other hand,
are darker brownish-black, more nearly like the paratypical series of
_nigrescens_ from the Valley of Comitan, Chiapas, Republic of Mexico.
This darker brownish-black color of the back persists in specimens from
southern Guatemala and El Salvador (see specimens examined of _B. m.
nigrescens_ for localities), and they are best referred to _nigrescens_.
_B. m. grisescens_, in color and certain cranial characters, therefore,
seems to grade into two different subspecies: (1) _B. m. handleyi_, pale
mice in the Rio Negro valley in central Guatemala, and (2) _B. m.
nigrescens_, dark mice from southern Guatemala, and parts of El
Salvador.
Felten (1958:136) referred all _B. musculus_ from El Salvador to _B. m.
grisescens_. Although I have not examined the specimens reported on by
Felten (_loc. cit._), I have examined specimens from Lake Atescatempa,
Guatemala (which I refer to _grisescens_), not too distant from Cerro
Blanco, and Finca Las Canarias, Department of Ahuachapan, and Laguna de
Guija, Department of Santa Ana (localities listed by Felten). It would
seem that specimens from these localities might indeed be _grisescens_.
However, specimens that I examined from 1 mi. S Los Planes, and 1 mi. NW
San Salvador were considerably darker than paratypes of _grisescens_ and
were nearly intermediate in color between _nigrescens_ and _pullus_. I
refer the specimens from 1 mi. NW San Salvador, and 1 mi. S Los Planes
to _nigrescens_ rather than to _grisescens_.
There is no positive evidence that _B. m. grisescens_ intergrades with
_B. m. pullus_ to the south in Nicaragua. But, there is a suggestion
that intergradation occurs between these subspecies in a series of 76
skins from La Piedra de Jesus Sabana Grande, Honduras, referable to
_grisescens_. A total of 16 of 76 skins from this locality (21 per cent)
possess the mid-ventral white stripe found in 18 of 20 skins (90 per
cent), from the type locality of _pullus_ in Nicaragua. Further
collection in areas between central Honduras and western Nicaragua may
yield specimens of _B. musculus_ that are intermediate in characters
between _grisescens_ and _pullus_.
_Specimens examined._--Total 149, distributed as follows: GUATEMALA: 1
mi. S Rabinal, 3450 ft., 14; 1/2 mi. N, 1 mi. E Salama, 3200 ft., 10;
Lake Atescatempa, 10[7]. HONDURAS: Cementario, Gracias, 1[8]; Monte
Redondo, 1[8]; El Caliche, Cedros, 1[8]; _La Flor Archaga_, 2[8], 1[9];
Hatillo, 1[8]; _type locality_, 7[8], 6[7] (including the type), 3[9];
_El Zapote_, _Sabana Grande_, 4[8]; La Piedra de Jesus Sabana Grande,
76[8]; _Cerro de las Cuches Sabana Grande_, 5.
_Marginal records._--GUATEMALA: 1/2 mi. N, 1 mi. E Salama, 3200 ft.
HONDURAS: El Caliche, Cedros; Hatillo; La Piedra de Jesus Sabana Grande;
Cementario. GUATEMALA: Lake Atescatempa; 1 mi. S Rabinal, 3450 ft.
[7] United States National Museum (Biol. Surv. Collections).
[8] American Museum of Natural History.
[9] Univ. Michigan, Museum of Zoology.
=Baiomys musculus handleyi= Packard
_Baiomys musculus handleyi_ Packard, Univ. Kansas Publs., Mus. Nat.
Hist., 9:399, December 19, 1958.
_Baiomys musculus musculus_, Goodwin, Bull. Amer. Mus. Nat. Hist.,
68(1):39-40, December 12, 1934 (part); Miller and Kellogg, Bull.
U. S. Nat. Mus., 205:512, March 3, 1955 (part).
_Baiomys musculus nigrescens_, Hall and Kelson, The Mammals of North
America, 2:661, March 31, 1959 (part).
_Type._--Adult female, skin and skull; No. 275604 U. S. Nat. Mus. (Biol.
Surv. Coll.); Sacapulas, El Quiche, Guatemala; obtained on April 24,
1947, by Charles O. Handley, Jr., original number 991.
_Range._--Known only from the type locality in the valley of the Rio
Negro. Zonal range: Part of the Chimaltenangan Province of Smith
(1949:235).
_Diagnosis._--Size medium to large for the species; dorsum Wood Brown in
some series to Buffy Brown; guard hairs of dorsum black-tipped, color of
underhairs Avellaneous; hairs white to base in region of chin, throat,
and median venter; in lateral region, hairs Neutral Gray at base; dorsal
surfaces of forefeet and hind feet and ankles white; tail white below,
brownish above; nasals truncate anteriorly; frontoparietal suture
forming an obtuse angle with the suture separating the parietals;
alveolar length of upper molar tooth-row and tail long. Average and
extreme external and cranial measurements for nine adults from the type
locality are as follows: Total length, 121.4 (115-128); length of tail
vertebrae, 50.7 (49-54); length of body, 70.8 (66-77); length of hind
foot, 15.3 (15-16); occipitonasal length, 19.6 (18.8-20.7); zygomatic
breadth, 10.5 (10.2-11.0); postpalatal length, 6.9 (6.4-7.4); least
interorbital breadth, 4.0 (3.9-4.0); length of incisive foramina, 4.2
(4.0-4.5); length of rostrum, 7.2 (7.0-7.7); breadth of braincase, 9.8
(9.7-10.2); depth of cranium, 7.1 (6.8-7.2); alveolar length of
maxillary tooth-row, 3.5 (3.4-3.6); for photographs of skull, see Plate
1_c_, and Plate 3_c_.
_Comparisons._--From _B. m. nigrescens_, _B. m. handleyi_ differs as
follows: everywhere paler; forefeet and hind feet whitish instead of
dusky to sooty; hairs of anterior part of face white instead of brown;
tail bicolored instead of unicolored; anterior tips of nasals truncate
rather than rounded; frontoparietal suture forming obtuse angle with
suture separating parietals instead of forming right angle; tail and
upper molar tooth-row longer.
From _B. m. grisescens_, _B. m. handleyi_ differs in: slightly paler
above and below, primarily as a result of lacking buff-colored hairs;
forefeet and hind feet white, not flesh-colored with gray overtones;
tail bicolored, not unicolored; anterior tips of nasals truncate rather
than flaring; tail and upper molar tooth-row longer.
_Remarks._--_B. m. handleyi_ seems to be restricted to the valley of the
Rio Negro, in the region of Sacapulas, Guatemala. Stuart (1954:7) points
out that the Rio Negro drops down into a gorge at a place near Sacapulas
and flows northward through a deep canyon for approximately 60
kilometers. The Rio Negro, then, flows onto the lowlands of the Yucatan
Peninsula. The habitat is xerophytic in the valley of the Rio Negro near
Sacapulas. Stuart (_op. cit._:10) suggests that this xerophytic habitat
may be continuous to a place to the north of Chixoy, Chiapas, where the
vegetation then becomes more mesic. The mesic conditions to the north in
Tabasco and Yucatan probably have restricted the movement of pygmy mice
to the north. No specimens of this mouse are known from the Yucatan
Peninsula or from the State of Tabasco, Mexico. _B. m. handleyi_
intergrades with _B. m. grisescens_ to the south. Specimens from 1 mi. S
Rabinal, and those from a second locality 1/2 mi. N and 1 mi. E Salama,
Guatemala, are intermediate in color of pelage between _handleyi_ and
_grisescens_. Stuart (_op. cit._:5) mentions the continuity of habitat
and tributaries from the Salama Basin into the valley of the Rio Negro.
Absence of physiographic and biotic barriers in the corridor between
these two basins probably allows for some gene flow between _handleyi_
and _grisescens_, and results in populations intermediate in color. To
the north and northwest of Sacapulas, the Sierra de los Cuchumatanes
rises abruptly and separates the known geographic range of _handleyi_
from that of _nigrescens_ to the north, while to the west the
cactus-mesquite habitat of _handleyi_ gives way to the oak-pine timber
that, so far as known, does not support _Baiomys_. The difference in
elevation and flora seems to restrict gene flow between _handleyi_ and
the more northern _nigrescens_. The only evidence of integration between
these two subspecies is provided by one specimen from Chanquejelve,
Guatemala. That specimen is intermediate in color between the pale
_handleyi_ and blackish-brown _nigrescens_.
The subspecies closest, geographically, to _B. m. handleyi_ is _B. m.
nigrescens_, from which _B. m. handleyi_ differs more in color than from
any of the other named subspecies, except _B. m. pullus_. There is a
close correlation of pallor of mice and the xeric Rio Negro Valley, and
the darkness (melanistic color) of mice and the mesic mountains and
valleys to the north.
_Specimens examined._--Total 49, from GUATEMALA: type locality,
including the type: 12 (U. S. Nat. Mus., Biol. Surv. Coll.), 37 (Amer.
Mus. Nat. Hist.).
=Baiomys musculus infernatis= Hooper
_Baiomys musculus infernatis_ Hooper, Jour. Mamm., 33:96, February
18, 1952; Miller and Kellogg, Bull. U. S. Nat. Mus., 205:512,
March 3, 1955; Hall and Kelson, The Mammals of North America,
2:661, March 31, 1959.
_Baiomys musculus musculus_, Hooper, Jour. Mamm., 28:50, February
15, 1947 (part).
_Type._--Adult male, skin and skull; No. 91497 Univ. of Michigan, Museum
of Zoology; Teotitlan, Oaxaca, Republic of Mexico, obtained on February
24, 1947, by Helmuth O. Wagner, original number 2702.
_Range._--Southeastern Puebla, in the basin drained by the Rio Salado
and Rio Quiotepec, into northern Oaxaca. Zonal range: Arid Tropical in a
part of the Orizaba-Zempoaltepec Faunal District of the Transverse
Volcanic Biotic Province of Moore (1945:218). Occurs from 3100 feet in
Oaxaca up to 6000 feet in Puebla.
_Diagnosis._--Size medium for the species; dorsum Drab, terminal parts
of individual guard hairs black, Neutral Gray basally, distal parts of
underfur Pinkish Buff, proximally Neutral Gray; sides same color as
dorsum; hairs in region of throat and chin white to base; venter whitish
to Neutral Gray with tinges of Pinkish Buff; dorsal parts of forefeet
and hind feet whitish with flesh-colored undertones, ventral parts
whitish to dusky-gray; tail bicolored, grayish-brown above, white below;
tip of tail not bicolored, instead grayish-brown throughout; ears pale
brown, sparsely haired; incisive foramina long, not constricted
posteriorly. Average and extreme external measurements for 9 adults from
the type locality are as follows: total length, 113.9 (106-122); length
of tail vertebrae, 44.1 (41-48); length of body, 71.0 (65-79); length of
hind foot, 14.8 (13-16); length of ear, 11.9 (11-12). Average and
extreme cranial measurements of 7 adults from the type locality are as
follows: Occipitonasal length, 20.1 (19.7-20.4); zygomatic breadth, 10.4
(10.2-10.6); postpalatal length, 7.3 (7.0-7.7); least interorbital
breadth, 4.2 (4.0-4.4); length of incisive foramina, 4.8 (4.4-5.6);
length of rostrum, 7.2 (6.6-7.5); breadth of braincase, 9.6 (9.5-9.8);
depth of cranium, 7.4 (7.1-7.6); alveolar length of maxillary tooth-row,
3.3 (3.1-3.4); for photographs of skull, see Plate 1_d_, and Plate 3_d_.
_Comparisons._--For comparisons with _B. m. nigrescens_ and _B. m.
brunneus_, see accounts of those subspecies. From _B. m. pallidus_, _B.
m. infernatis_ differs in: sides, ears, and dorsum paler (less of dark
brown); venter whitish gray rather than gray with tinge of buff and
brown; forefeet and hind feet paler; tail bicolored, not unicolored;
incisive foramina longer and not constricted posteriorly; mastoid
process turning dorsally and sickle-shaped at posteriormost point rather
than capitate.
_Remarks._--_B. m. infernatis_ resembles _B. m. handleyi_ more than any
other subspecies in color of pelage and in external and cranial
dimensions. The resemblance in color between _B. m. pallidus_, in
certain parts of its range, and _B. m. handleyi_ may have resulted from
nearly parallel selective forces that gave rise to two subspecies,
widely separated geographically. The same relation obtains between _B.
m. infernatis_ and _B. m. handleyi_. Both inhabit arid river basins. In
them, pale soil and low relative humidity are important passive factors
of selection that give adaptive value to the pale colors of pelage of
both _infernatis_ and _handleyi_.
Specimens from 6-1/2 mi. SW Izucar de Matemores, and 1 mi. SSW Tilapa,
Puebla, are intergrades between _B. m. infernatis_ and _B. m.
pallidus_. These specimens are intermediate in color and cranial
characters between the aforementioned subspecies but possess more of the
pale brown overtones seen in paratypes of _pallidus_, and are best
referred to that subspecies.
_Specimens examined_ (All in Univ. Michigan, Mus. Zool.).--Total 18, all
from the Republic of Mexico and distributed as follows: PUEBLA,
Tepanaco, 6000 ft., 3, Tehuacan, 5400 ft., 3. OAXACA: Type locality,
3100 ft., 12 (including the type).
_Marginal records._--See specimens examined.
=Baiomys musculus musculus= (Merriam)
_Sitomys musculus_ Merriam, Proc. Biol. Soc. Washington, 7:170,
September 29, 1892; Lyon and Osgood, Bull. U. S. Nat. Mus.,
62:135, January 15, 1909.
_Baiomys musculus_ [= _musculus_], Mearns, Bull. U. S. Nat. Mus.,
56:381, April 13, 1907; Hooper, Jour. Mamm., 36:29, May 26, 1955.
_Peromyscus musculus_ [_musculus_], J. A. Allen and Chapman, Bull.
Amer. Mus. Nat. Hist., 9:203, June 16, 1897; Elliot, Field Columb.
Mus. Publ., 105(4):135, July 1, 1905; Osgood, N. Amer. Fauna,
28:257, April 17, 1909 (part).
[_Peromyscus_] _musculus_, Trouessart, Cat. Mamm., 1:518, 1898.
[_Peromyscus_] _musculus_ [_musculus_], Elliot, Field Columb. Mus.
Publ., 95(4):175, July 15, 1904.