FAM. EMPIDID/E 275 
Middle tibie c slightly excised; palpi yellow; hypopygium without 
long hair; hind knees narrowly yellow ; third section of costa two 
to three times the fourth section . . . . . . rcs eU T ROSTRATA, I:06W. 
12. Pruinosity of humeri encroaching on mesopleurae; ds (Q) not 
striped with black, hind tibize blackish; antenne red . . . . . T.PnurzwNosa, Coquillett. 
Pleurz not pruinose beneath the notopleural suture . . . eo ucc rase aequ ipt Ede 
13. Front femora cf marked with black, hind tibi: yellow with Pack tip; . 
aBltenne yellow 65 56-  icaetee HIE RTI E c Dau eu n Ta, 
Legs uniformly blackish, not marked with black Mod: antennae 
blacidshe e MM PES cg qe Lc UM. s ced. DOLOROSA fIOV. Sp: (X). 
14. Front trochanters and coxe c with black spot, front femora c with 
a black line beneath ; wings smoky exceptat base . . . . . . T. rENESTRATA, Say. 
Coxa and trochanters not marked, front femora gf with two black 
EDI UMP ven sHODP even abbusecs Usu NL M Qu idMl ur vice 4c vais ius. I)e 
15. Middle femora (gj tuberculate at base; apex of posterior tibi; and 
underside of hind femora black; veins smoky in middle of wing, 
the outer third of wing not dark; humeri pollinose. . . . . . T. BiNOTATA, nov. sp. (2). 
arista two and one-half times the length of the antennz : palpi brown, with pale hairs and with a terminal black bristle ; 
proboscis yellow, its tip black. Mesonotum and humeri subshining through the scabrous coating which extends over the 
notopleural suture near the root of the wing and thinly covers the posterior half of the pleure; the usual pair of stiff dorso- 
central and scutellar bristles present. Abdomen opaque except the large globose hypopygium, whose upper appendages 
are furnished with dense curved hairs. — Legs robust, the front femora especially so, yellowish, but with a blackish streak 
on the outer side of the anterior femora, also the middle part of the hind femora and both sides of all the tibiz blackish ; front 
femora not ciliate nor noticeably setulose, the flexor surface of the middle femora and tibiz strongly setulose, of the hind 
femora less strongly so; several long stiff black bristles bunched at the base of the middle femora, matching a pronounced 
excision near the tip of the tibiz; fronttibie scarcely thickened. Halteres yellowish. Wings subhyaline, a little infuma- 
ted on the costal half, veins blackish but not clouded, a little paler toward the base, the third and fourth veins converging, 
the fourth sections of the costa about one-fourth as long as the third section, the crossveins and the space between them all 
subequal, the outer sections of the fifth vein equal. 
A single male collected by Nathan Banks at Ithaca, New York, July 7. 
(1) Tachypeza dolorosa, nov. sp. — Length 3mm. Front and occiput gray pruinose. the upper occipital bristles 
black, the lower ones white; no ocellar bristles : antenne black, the outer joint ovate, with subterminal arista, which is 
nearly four times as long as the antenne ; palpi pure white and with white hairs; proboscis black. Mesonotum and humeri 
except their lower edge opaque pollinose, the usual small humeral, strong notopleural, single pair of posterior dorsocentral 
and two scutellar bristles present; pleurze shining black except for a thin coating of pollen near the middle coxe. Abdomen 
subshining, the hypopygium moderate, its upper lamelle sparsely hairy, the hairs of the last ventral rather long. — Legs 
black, the inside of the front femora and the base of the tarsi brown, no spottings or peculiar armature in the C except for a 
slight emargination near the tip of the middle tibiz and a corresponding pair of setulz at the base of the middle femora. 
Halteres white ; calypteres with a short fringe of about ten white hairs. Wings long and narrow, smoky except at the base, 
veins black, the fifth vein dark even at its root, third and fourth veins slightly converging, the third section of the costa 
three times as long as the fourth, the posterior crossvein about two-thirds the length of the oblique anterior crossvein, the 
distance between them nearly two times the length of the posterior crossvein, last section of the fifth vein three-fourths the 
length of the preceding section. 
Cloudcroft, New Mexico. "This is the species mentioned in the Transactions of the American Entomological Society, 
vol. 28, p. 343, as rapax, occurring in company with corticalis — 'This last species is common in the West. I have seen it from 
New Mexico, California, Washington, Idaho, Montana, Wyoming and British Columbia. 
(2) Tachypeza binotata, nov. sp. — Male. Length 3.3 mm. Occiput cinereous, with four black bristles above 
and numerous white hairs below, the front cinereous, no ocellar bristles; antennze yellowish, the outer joint oval, the termi- 
nal arista nearly four times the length of the antenne : palpi white and white-hairy; proboscis yellow except the very tip. 
Mesonotum and humeri opaque cinereous, pleurz entirely polished black. Abdomen shining piceous black, the hypopy- 
gium large, globular, jet-black, its upper appendages nearly bare, the last ventral segment with a loose fringe of long brown 
hairs. Legs rather robust, including the coxz largely yellow, the front femora with two large subquadrate black spotsbelow, 
middle tibize tipped with black, the basal two-thirds of the hind femora, the base and apex of the hind tibize and much of all 
the tarsi brown, femora not ciliate and scarcely setulose, the middle femora with a pronounced spine-tipped tubercle at the 
