272 A. L. MELANDER. 



Hilara carbouaria sp. nov. 

 Length 3 mm. — Black over all except wings (halteres missing of all the speci- 

 mens, bnt most probably black also). Thorax, occiput and front black, velvety ; 

 ocellar triangle not raised ; autennse two-thirds the height of the head, third 

 joint thickened, not finely pointed, twice as long as basal joints together, the 

 arista short, thickened, eyes not deeply notched at antenna^. Proboscis slender, 

 pointed, in length equal to the antennse, ; palpi generally hanging down and then 

 longer than proboscis. Thorax very little shining along sides when viewed from 

 the side. Seen from the front the dorsum has two faint piceous-gray glabrous 

 stripes extending nearly to the scutellum. Vertex, thoracic dorsum, margins of 

 abdominal segments and base of hypopygium with small black bristles, longer on 

 hypopygium ; scutellum with four marginal bristles, the inner pair long. Abdo- 

 men moderately shining; hypopygium large, compressed, almost carinate, ab- 

 ruptly rounding the abdomen, no parts exposed. Legs wholly black, anterior 

 metatarsus of the male not much enlarged, shorter than the remainder of the 

 tarsus, but little thicker than the tibia, hairy, and with a few bristles above; 

 bases of legs moderately shining; femora and tibiae bristly; hind tibire straight, 

 very slightly compressed. Wings whitish, veins pale fuscous, no stigma, first 

 vein thickened near insertion in costa, venation normal. 



Two males and five females; New Bedford, Mass., June 12th. 

 This species is distinct from velntina Loew by the coloration of 

 the wings and the absence of stigma. 



Hilara congregaria sp. nov. 

 Length 4 mm. — Head and thorax gray-black, faintly glaucous, slightly shin- 

 ing. Eyes narrowly, moderately deeply emarginate at antennae. Antenna? 

 black, third joint lanceolate, short, style thick, somewhat shorter than the third 

 antennal joint. Occipital bristles brownish. Palpi testaceous, underside with 

 pale hairs; each provided with a long dark seta exceeding the antenna in length, 

 arising from the outer third of the underside. Proboscis black, generally shorter 

 than one-half the height of the head. Thoracic bristles brown, acrostichals 

 arranged in three series, thorax not vittate; scutellum with four marginal 

 piceous bristles, the inner pair long; metathorax black, glaucous. The spar.se 

 marginal hairs of the abdominal sclerites pale. Abdomen piceous, sometimes 

 fuscous at base; hypopygium compressed, not longer than the end of the abdo- 

 men, lateral valves small, serrate above, filament hidden. Legs pale testaceous, 

 except the piceous front tarsi of the male, the hind tibise of the female and the 

 gradually darkened remaining tarsi of both sexes; outer edge of anterior tibise 

 and metatarsi of the male with pale downy hairs, at the tip of the tiljise are a 

 couple of stouter, darker hairs; no long hairs on remainder of legs, except on all 

 the coxfe ; anterior male metatarsi oblong, thickened, subequal to the remainder 

 of the tarsus, anterior tibise slightly cylindrically thickened ; female with ante- 

 rior legs plain, a few short bristly hairs on anterior surface of middle femora, 

 posterior femora curved, and posterior tibise incrassate. fusiform, as thick as the 

 femora. Halteres testaceous. Wings clear hyaline, stigma at most very faint, 

 veins light fuscous, neuration normal. 



Thirteen males and seven females ; Monterey Co., California, July 

 23, 1896. Collected by Dr. Wheeler. 



