176. DACUS DIVERGENS, n. s. _Mas._ Purpureus, longus, angustus; fronte
tumida, facie carinata fulvo maculata, palpis fulvis, antennis piceis,
arista alba subpubescente, thorace vittis tribus cinereis, abdomine
fusiformi apicem versus cylindrico et cyaneo, pedibus piceo-nigris,
femoribus fulvis, tarsis posticis rufescentibus, alis cinereis apices
versus et apud venas transversas fuscis, halteribus albido-flavis.
_Male._ Bluish purple, long, slender; head whitish about the eyes;
front tumid, convex; face keeled, with a large elongated tawny spot;
palpi tawny; antennæ piceous, reaching the epistoma, tawny at the
base; 3rd joint linear, conical at the tip, six times the length of
the 2nd; arista white, minutely pubescent, very much longer than the
3rd joint; thorax slightly compressed, with three cinereous stripes;
pectus cinereous; abdomen fusiform, cylindrical, and mostly blue
towards the tip, very much longer than the thorax; legs piceous black;
femora tawny; hind tarsi reddish except at the tips; wings cinereous,
brown on the fore part towards the tips and about the transverse
veins, the brown part including a curved cinereous streak between the
cubital and præbrachial veins; veins black; præbrachial vein very
slightly undulating; discal transverse vein curved outward, parted
by one-fourth of its length from the border, and by much more than
its length from the oblique præbrachial transverse; halteres whitish
yellow. Length of the body 7 lines; of the wings 12 lines.
The genus _Dacus_ includes many distinct forms, and will probably be
soon divided into numerous subgenera; the characters of the preceding
species differ much from those of the type, _D. Oleæ_. Some of the
following species may belong to _Senopterina_, Macq.
177. DACUS ADDENS, n. s. _Foem._ Cyaneus, longus, angustus, capite
nigro, facie plana perobliqua, arista cinerea nuda, thorace vittis
tribus cinereis, abdomine æneo-viridi, tibiis tarsis halteribusque
nigris, alis cinereis apud costam et apud venam transversam discalem
nigricantibus.
_Female._ Blue, long, narrow; head black, depressed above, white about
the eyes; face very oblique, forming before the front a protuberance
on which the antennæ are seated, its fore part oblong quadrate,
almost flat, with whitish furrows for the antennæ; palpi and antennæ
black, the latter reaching the epistoma; 3rd joint linear, rather
obtuse at the tip, six times the length of the 2nd; arista cinereous,
bare, hardly longer than the 3rd joint; thorax with three indistinct
cinereous stripes; abdomen æneous-green, nearly linear, slightly
compressed, much longer than the thorax; oviduct protuberant, slender;
legs short, stout; tibiæ and tarsi black; wings grey, blackish along
the costa and about the transverse veins; veins and halteres black;
discal transverse vein straight, upright, parted by full one-fourth of
its length from the border, and by much more than its length from the
præbrachial transverse. Length of the body 6 lines; of the wings 12
lines.
178. DACUS BILINEATUS, n. s. _Foem._ Fulvus, longiusculus, nigro
bivittatus, capite antennisque rufescentibus, arista plumosa, palpis
porrectis; pedibus breviusculis nigro fasciatis, alis cinereis, costa
venaque transversa discali fusco nebulosis, halteribus testaceis.
_Female._ Tawny, rather long; head reddish in front; epistoma rather
prominent; palpi porrect; antennæ reddish, nearly reaching the
epistoma; 3rd joint linear, rounded at the tip, about thrice the length
of the 2nd; arista somewhat plumose; thorax elongate-elliptical, with
two black stripes; abdomen lanceolate, shining, with two broad black
stripes, longer than the thorax; legs rather short, with diffuse black
bands; wings grey, brownish along the costa and about the discal
transverse vein; veins black, tawny at the base; discal transverse
vein nearly straight and upright, parted by one-fourth of its length
from the border, and by much more than its length from the præbrachial
transverse; halteres testaceous. Length of the body 4 lines; of the
wings 7 lines.
179. DACUS IMITANS, n. s. _Foem._ Cyaneus, angustus, capite atro,
antennis pedibusque nigris, tarsis posticis basi albidis, alis
cinereis, costa vittaque nigris, halteribus piceis.
This species is closely allied to _D. longivitta_, and _D. exigens_ and
_D. contrahens_ belong to the same group.
_Female._ Dark blue, narrow, with slight cinereous tomentum; head deep
black above, white about the eyes; peristoma very prominent; proboscis
large; antennæ black, nearly reaching the epistoma; 3rd joint linear,
conical at the tip, about four times the length of the 2nd; arista
bare, slender; abdomen fusiform, narrower and a little longer than the
thorax; oviduct protuberant, slender; legs black, moderately long;
first joint of the hind tarsi whitish above; wings cinereous, black
along most of the costa to the tips, and black on the space between
the cubital and præbrachial veins as far as the præbrachial transverse
vein; discal transverse vein straight, upright, parted by less than
half its length from the border, and by very much more than its length
from the præbrachial transverse; halteres piceous. Length of the body
3-1/2 lines; of the wings 6 lines.
180. DACUS EXIGENS, n. s. _Mas._ Viridescente cyaneus, angustus,
capite rufescente piceo, antennis luteis, arista nuda, thorace vittis
tribus cinereis, pedibus fulvis, alis cinereis striga costali apiceque
fuscis, halteribus testaceis.
_Male._ Greenish blue, narrow; head reddish, piceous above, white
about the eyes, black in front; antennæ luteous, reaching the
epistoma; 3rd joint slightly lanceolate, full four times the length of
the 2nd; arista slender, simple; thorax with three cinereous stripes;
abdomen almost cylindrical, much longer than the thorax; legs tawny;
tarsi black towards the tips; wings grey, brown at the tips and with
a brown streak on the middle of the costa; veins black, tawny towards
the base; discal transverse vein straight, upright, clouded with
brown, parted by less than half its length from the border, and by
much more than its length from the præbrachial transverse; halteres
testaceous. Length of the body 3-1/4 lines; of the wings 5-1/2 lines.
181. DACUS CONTRAHENS, n. s. _Foem._ Cyaneus, angustus, capite
supra atro apud oculos albo, antennis luteis, thorace vittis tribus
cinereis, pedibus piceis, alis cinereis vitta costali interrupta
nigricante, vena transversa discali nigricante nebulosa, halteribus
albidis.
_Female._ Dark blue, narrow; head deep black above, white about the
eyes, piceous in front; antennæ luteous, reaching the epistoma; 3rd
joint linear, conical at the tip, about six times the length of the
2nd; arista slender, simple; thorax with three cinereous stripes;
abdomen compressed, a little longer than the thorax; legs piceous;
wings grey, with a blackish interrupted costal stripe, which is
dilated at the tip of the wing; veins black; discal transverse vein
clouded with blackish, parted by half its length from the border, and
by a little more than its length from the præbrachial transverse;
halteres whitish. Length of the body 3 lines; of the wings 5 lines.
182. DACUS INAPTUS, n. s. _Mas et Foem._ Viridis, capite atro, facie
fulva basi alba, antennis piceis, pedibus halteribusque nigris, alis
angustis cinereis.
_Male and Female._ Green, with slight cinereous tomentum; head deep
black, white about the eyes; face tawny, white at the base; antennæ
piceous, reaching the epistoma; 3rd joint lanceolate, full four
times the length of the 2nd; arista bare, long, slender; thorax
long, slightly compressed; abdomen slightly compressed at the
base, linear, narrower and a little shorter than the thorax in the
male, fusiform and much attenuated towards the tip in the female;
legs black, moderately long; wings narrow, cinereous; veins black,
straight; discal transverse vein straight, upright, parted by less
than half its length from the border, and by almost twice its length
from the præbrachial transverse; halteres black. Length of the body
3-1/2-4-1/2 lines; of the wings 6-8 lines.
183. DACUS TERMINIFER, n. s. _Foem._ Niger, nitens, breviusculus,
capite rufescente, antennis fulvis, arista nuda, scutello pectorisque
maculis duabus flavis, pedibus breviusculis, tibiis anterioribus
femoribus posticis basi tarsisque albidis, alis vitreis, striga
costali puncto apicali vittaque postica nigricantibus, halteribus
testaceis.
_Female._ Black, shining, rather short; head reddish above; antennæ
tawny, reaching the epistoma; 3rd joint linear, piceous towards the
tip, which is rounded, about six times the length of the 2nd; arista
slender, bare; scutellum dull yellow; pectus with an oblique yellow
spot on each side; abdomen hardly broader than long, a little broader
and shorter than the thorax; legs rather short; tarsi and anterior
tibiæ whitish; hind femora whitish towards the base; wings vitreous,
with a short black stripe extending from the base to near the hind
border; costa with a blackish streak in the middle and with a blackish
apical point; discal transverse vein straight, upright, parted by
about one-third of its length from the border, and by more than its
length from the præbrachial transverse, which is oblique and unusually
long; halteres testaceous. Length of the body 2-1/2 lines; of the
wings 5 lines.
184. DACUS EMITTENS, n. s. _Mas et Foem._ Fulvus, facie brevi nigro
biguttata, antennis pallide luteis, arista nuda, thorace lineis
quinque rufescentibus, disco nonnunquam nigricante-cinereo, scutello
callisque humeralibus flavis, abdomine nigro-fasciato, alis vitreis
fusco plus minusve strigatis, halteribus albido-testaceis.
_Male and Female._ Tawny, convex, minutely pubescent; face short, with
a black dot on each side; antennæ pale luteous, reaching the epistoma;
3rd joint linear, conical at the tip, full four times the length of
the 2nd; arista slender, bare, much longer than the 3rd joint; thorax
with five reddish lines; scutellum and humeral calli yellow; metathorax
with a blackish mark on each side; abdomen short, oval, broader than
the thorax, concave beneath, from whence in the female the lanceolate
apical part proceeds; a protuberance on each side at the base, and a
black middle band, behind which there is a slight longitudinal black
line; wings vitreous, lurid and partly brown along the costa, brown
along the subanal vein, and brown about the tips, excepting most of
the space between the discal transverse vein and the border; veins
tawny, partly black, slightly deviating; discal transverse vein nearly
straight, parted by about one-third of its length from the border, and
by more than its length from the oblique and rather long præbrachial
transverse; halteres whitish testaceous. _Var. β._ Abdomen with two
black bands. _Var. γ, Male_. Discal transverse vein not clouded
with brown. _Var. δ, Male_. Præbrachial transverse vein clouded
with brown. _Var. ε, Male_. Disk of the thorax blackish grey;
wings vitreous, excepting a slight brown line along the costa, and
another along the subanal vein. _Var. ζ. Male_. Abdomen with a black
interrupted subapical band. Length of the body 3-6 lines; of the wings
5-10 lines.
This species is closely allied to _D. ferrugineus_ and to _D.
trivittatus_, but may be distinguished by the luteous hue along the
costa.
185. DACUS DIFFUSUS, n. s. _Foem._ Testaceus, facie nigro fasciata,
palpis nigro notatis, thoracis vittis duabus angustis abbreviatis et
metathoracis fasciis duabus angustis nigris, abdomine fusiformi, alis
subcinereis apud venas fuscescente subnebulosis.
_Female._ Testaceous, not shining; head paler about the eyes, with
a black band on the face near the epistoma; palpi with a black mark
on each outer side; antennæ reaching the epistoma; 3rd joint linear,
rounded at the tip, more than four times the length of the 2nd; arista
bare; thorax with two narrow abbreviated black stripes; metathorax
with two slender black bands; abdomen fusiform, narrower and a little
longer than the thorax; legs moderately long; wings slightly greyish,
irregularly clouded with very pale brown about the veins; the latter
black, testaceous towards the base; discal transverse vein straight,
upright, parted by about one-fourth of its length from the border, and
by much less than its length from the præbrachial transverse, which is
undulating and very oblique. Length of the body 4 lines; of the wings
7 lines.
186. DACUS FULVITARSIS, n. s. _Foem._ Niger, longiusculus, capite
apud oculos albo, antennis piceis, abdomine lanceolato, femoribus
basi fulvis, metatarsis subdilatis, tarsis posterioribus fulvis, alis
cinereis nigricante nebulosis, halteribus testaceis.
_Female._ Black, rather long and narrow; head white about the
eyes; face small; antennæ piceous, short; 3rd joint nearly round,
a little longer than broad; arista long, bare; thorax elongate;
abdomen lanceolate, longer than the thorax; femora tawny at the
base; metatarsi slightly dilated; posterior tarsi tawny, with black
tips; wings grey, partly clouded with blackish; veins black; discal
transverse vein straight, upright, parted by about twice its length
from the border, and by about thrice its length from the præbrachial
transverse; halteres testaceous. Length of the body 2-1/2 lines; of
the wings 4 lines.
Gen. CALLANTRA, n. g.
_Foem. Corpus_ convexum. _Caput_ thorace vix angustius. _Palpi_
distincti, porrecti. _Antennæ_ longæ, petiolo aut articulo 1° communi,
arista nuda. _Thorax_ brevis. _Abdomen_ petiolatum, postice ovatum et
valde convexum, subtus concavum. _Pedes_ mediocres. _Alæ_ sat angustæ.
_Female._ Body convex. Head almost as broad as the thorax; face
vertical; palpi distinct, porrect; antennæ long, seated on a common
petiole or first joint, with which the succeeding part forms a right
angle; 3rd joint very slightly increasing in breadth from the base
to the tip, full thrice the length of the 2nd joint, which is rather
long; arista bare, slender, a little longer than the 3rd joint. Thorax
short. Abdomen petiolated, oval and very convex hindward, concave
beneath, very much longer than the thorax. Legs moderately long. Wings
rather narrow.
187. CALLANTRA SMIEROIDES, n. s. _Foem._ Fulva, facie nigro-biguttata,
antennis testaceis, thoracis fascia, scutello, callis duobus
humeralibus, pectoris lituris duabus, abdominis fasciis duabus
lituraque subapicali flavis, alis subcinereis apud costam
fuscescentibus, halteribus testaceis.
_Female._ Tawny; head testaceous about the eyes; face with a black
dot on each side; antennæ testaceous, extending beyond the epistoma;
thorax with two yellow humeral calli, and with a yellow band which is
continued on each side of the pectus, the latter having a yellow mark
on each side hindward; scutellum yellow; abdomen with the hind borders
of the 1st and 2nd segments yellow; a yellow capitate subapical mark,
which is dilated on each side; wings slightly grey, brownish along the
costa; veins black, tawny towards the base; a lurid tinge along the
subanal vein; discal transverse vein oblique, nearly straight, parted
by less than half its length from the border, and by more than its
length from the præbrachial transverse; halteres testaceous. Length of
the body 4-1/2 lines; of the wings 7-1/2 lines.
Gen. ARAGARA, n. g.
_Foem. Corpus_ angustum. _Caput_ supra planum, thorace latius; facies
valde retracta. _Antennæ_ brevissimæ; articulus 3^{us} subrotundus;
arista nuda. _Thorax_ longus, subcompressus. _Abdomen_ ovatum, thorace
brevius. _Pedes_ antici raptorii, coxis longissimis, femoribus
incrassatis. _Alæ_ sat angustæ.
Allied to _Dacus_.
_Female._ Body narrow. Head flat above, broader than the thorax; face
much retracted. Antennæ very short; 3rd joint nearly round, a little
longer than the 2nd; arista bare, slender. Thorax long, slightly
compressed. Abdomen oval, shorter but hardly broader than the thorax.
Fore legs raptorious; coxæ very long; femora incrassated; tibiæ
shorter than the femora to which they are applied. Posterior legs
moderately long and stout. Wings rather narrow.
188. ARAGARA CRASSIPES, n. s. _Foem._ Cinereo-nigra, capite cyaneo,
tarsis testaceis, alis cinereis, halteribus albis.
_Female._ Black, slightly covered with cinereous tomentum; head
blue, shining, luteous on each side in front; antennæ black; thorax
cinereous on each side; tarsi testaceous, with black tips; wings grey;
veins black; præbrachial vein and subanal vein very near each other
from the base to the discal transverse vein, which is straight and
parted by four times its length from the border, and by more than
four times its length from the præbrachial transverse; halteres white.
Length of the body 2-1/2 lines; of the wings 4 lines.