402 THE NOBTR AMERICAN EMPIDM—COQUILLETT. vol.xviii. 



middle ones, liind metatarsi nearly as tliick and slightly longer tlian 

 the front ones. Knob of halteres blackish. Wings hyaline, stigma 

 and a broad border to the anterior branch of the third vein and on the 

 small and the posterior cross veins, dark brown ) veins brown, fonrth 

 vein obliterated before reaching the wing margin, anterior branch of 

 third vein nsually ending in the second vein, closing the first submar- 

 ginal cell; contact of discal and fourth posterior cells much longer than 

 that of the third and fourth posterior cells. 



Female. — Differs from the male in that the legs are wholly brown, 

 compressed, and the upper and under sides of all the femora, outer 

 and inner sides of all the tibire, and upper sides of the front and hind 

 metatarsi, ciliate with long, nearly erect scales. Base of abdomen 

 never tinged with yellow. 



Types.— Bo&. 3165 and 31G6, U.S.N.M. ; length, 4 mm. Five males 

 and five females captured by Mr. Charles Eobertson. 



Locality. — Illinois. 



EMPIS COMANTIS, new species. 



Male. — Black; apex of palpi, proboscis except the base and the lower 

 lip, femora except a large portion of the under side, tibite and tarsi 

 except at apex, yellowish red. First antenual joint twice as long as 

 the second; the third, one and a half times as long as the first; style 

 slender, as long as the third joint; frontal triangle naked; eyes nar- 

 rowly separated; proboscis three times as long as height of head. 

 Thorax opaque gray i^olliuose, marked with four blackish vittaj, 

 thickly white and black pilose, the bristles black; pile on each end of 

 pleura, on coxiie and abdomen, mixed black and white; that on venter 

 and sides of abdomen abundant, white. Scutellum white pilose and 

 bearing twelve marginal black bristles. Abdomen shining, nearly des- 

 titute of pollen ; hypopygium large, ascending; central filament largely 

 yellow, double, free, arcuate. Legs simple, femora thickened, the hind 

 ones over twice as thick as their tibia^ ; pile and bristles of femora 

 rather numerous and long. Wings slightly brownish, stigma and a 

 spot above base of second vein, dark brown, anterior branch of third 

 vein very oblique and much curved. 



Type.—Eo. 3167, U.S.X.M. ; length, 9 mm. Male, collected by Mr. 

 O. T. Baron. 



Locality. — Northern California . 



EMPIS VALENTIS, new species. 



Female. — Differs from E. comantis as follows : Femora entirely yellow- 

 ish, apices of tibioe and whole of tarsi black, third antennal joint twice 

 as long as the first, style less than one-half as long as the third joint. 

 Pile of thorax sparse, black; on each end of pleura, coxae, abdomen, 

 and venter wholly black; on venter and sides of abdomen very short 

 and sparse. Scutellum destitute of white pile, naked except for the 



