_Peromyscus melanotis_ Allen and Chapman, Bull. Amer. Mus.
Nat. Hist., 9:203, June 16, 1897, type from Las Vigas,
8,000 ft., Veracruz.
_Range._--Higher mountains throughout state.
_Specimens examined_, 33: nos. 51397-51401, 52142-52166, 52172-52174,
from TancA-taro.
_Remarks._--The elevation recorded on the label of one specimen is
9,000 feet and on the labels of other specimens is no lower than
10,500 feet and on some is as high as 12,000 feet. The elevation of
capture is not recorded for two specimens. Osgood (1909:112)
previously recorded the species from 12,000 feet elevation on Mount
TancA-taro.
=Oryzomys couesi regillus= Goldman
Tropical Rice Rat; Spanish, Rata Arrocera Tropical; Tarascan word for
rat is JeyAiquihuiri (Hayakewire), or Sarisi
_Oryzomys couesi regillus_ Goldman, Proc. Biol. Soc.
Washington, 28:129, June 29, 1915, type from Los Reyes,
MichoacAin; Goldman, N. Amer. Fauna, 43:37, September 23, 1918.
_Range._--Plateau region of Northeast MichoacAin.
_Specimens examined_, 22: nos. 100601-100622, distributed by
localities as follows: 1 mi. N Zamora, 5,450 ft., 2; 4 mi. W Zamora,
5,450 ft., 1; 4 mi. S PAitzcuaro, 7,800 ft., 1; 1 mi. E and 6 mi. S
TacAimbaro, 4,000 ft., 18.
_Remarks._--The tooth-row is longest in the specimens from Zamora,
shortest in those from TacAimbaro and intermediate in length in the one
specimen from PAitzcuaro. The shorter tooth-row at the lower elevation
(TacAimbaro), we interpret as intergradation with _Oryzomys couesi
mexicanus_. In color the specimens from TacAimbaro are, to us,
indistinguishable from those from Zamora and PAitzcuaro but the color
is notably darker than that of specimens from the vicinity of
Apatzingan which are here referred to the subspecies _Oryzomys couesi
mexicanus_. The largest male, fully adult from Zamora weighs 82.9
grams and the largest one from the vicinity of TacAimbaro weighs 73.6
grams.
=Oryzomys couesi mexicanus= Allen