AET. 23 TWO-WINGED DOLICHOPODID FLIES VAN DUZEE 11 



Described from five males and one female. Holotype, male was 

 taken at Echo Lake, Mount Desert, Maine, July 17, 1918, by C. W. 

 Johnson and is in the museum of the Boston Society of Natural 

 History; two males were taken at Lake Tear, Essex County, New 

 York, 4,500 feet elevation, July 21, 1920; two males were taken in 

 Polk County, Wisconsin, by C. F. Baker; allotype, female was taken 

 at Olean, New York, August 5, 1917. 



Allotype and paratype. — Female and male. Cat. No. 27035, 

 U.S.N.M. 



5. ARGYRA BREVIPES, new species 



Male. — Length, 3.5 mm. Face not very narrow, silvery white. 

 Front covered with white pollen. Proboscis and palpi black, with 

 black hairs. Antennae black; first joint with a few small hairs 

 above; third nearly as long as the face; arista apical, two-thirds as 

 long as the third joint. Lateral and inferior orbital cilia white. 



Thorax greenish-black; when viewed from in front it is opaque 

 Avith white pollen; scrutellum with one pair of large marginal 

 bristles, disk bare. Abdomen black, covered with silvery white 

 pollen ; the hind margins of the segments are narrowly white. 



Hypopygium black, quite shining ; its appendages almost concealed, 

 but there appear to be small, conical, black, outer lamellae. 



Fore coxae wholly yellow, nearly bare, except two or three black 

 bristles near the tip ; middle and hind coxae grayish, their bristles 

 black. All femora and tibiae yellow. All femora with only short 

 hair; still there are a few delicate hairs on the posterior surface 

 of the anterior ones which are a little longer; hind femora nearly 

 black at tip. Fore tibiae with two minute bristles; posterior tibiae 

 a little brown at tip. Fore and middle tarsi yellow, a little darker 

 at tip, joints of fore tarsi as 40-12-8-5-6, Hind tarsi wholly black, 

 their joints as 22-20-15-10-10. Calypters pale yelloAv with a broAvn 

 rip and yellow cilia ; halteres yellow. 



Wings grayish; third and fourth veins nearly parallel, the last 

 section of fourth being scarcely at all bent; last section of fifth 

 vein twice as long as the crossvein. 



Described from one male taken at Opelousas, Louisiana, April, 

 1897, by G, K. Pilate, 



r?//)e,— Male, Cat. No. 27036, U.S.N.M. 



6. ARGYRA BARBIPES. new species 



Male. — Length, 3.5 mm. Face wide, covered with whitish pollen. 

 Front green with a little white pollen. Palpi and proboscis black 

 with black hairs. Antennae black: first joint with strong hairs 

 above; third joint as long as the two first taken together, rounded 

 at tip; arista nearly apical, rather thick, scarcely as long as the 



