NEW NORTH AMERICAN DIPTERA—COQUILLETT. 123 



under side; front tibiae bearing a bristle near middle of posterior 

 side, middle tibitij with one above and one below the middle of the 

 posterior side, hind tibi® with two near middle of innor-antei-ior, two 

 near middle of outer-anterior, and one below middle of outer-posterior 

 side; front pulvilli as long as the last tarsal joint; wings h^'aline, cos- 

 tal spine minute, fourth vein diverging from the third; cal^^Dteres 

 white, halteres yellow; length T mm. A male spoeimon collected by 

 Mr. 11. K. Morrison. 



Habitat. — Southern Georgia. 



%>6^.— Cat. No. 6288, U.S.N.M. 



MYDiEA FLAVICORNIS, new species. 



Head ))lack, frontal orbits and face whitish pruinose, eyes of male 

 almost contiguous, the frontal vitta obliterated for a short distance; 

 antennte yellow, arista at base yellow, the remainder brown, the 

 longest hairs al)out twice as long as greatest diameter of arista, anten- 

 na^ slightly shorter than the face, the third joint broad, nearly three 

 times as long as the second; cheeks about one-tenth as wide as height 

 of eyes, proboscis dark brown, short and robust, palpi slender, yellow: 

 thorax black, gray pruinose, and marked with four black vittas, four 

 pairs of postsutural dorsocentral bristles, sternopleurals one and two; 

 one pair of acrostichal bristles, hairs between dorsocentral bristles 

 arranged in about eight irregular rows; scutellum yellow, the base 

 usually brown, three pairs of marginal ])ristles, of which the basal pair 

 is about half as long as the others; abdomen black, gray pruinose, the 

 last two segments bearing discal and marginal bristles; femora, tibia% 

 and tarsi yellow, bristles on under side of middle and hind femora, 

 except on apical third of the latter, shorter than diameter of the 

 femora; front tibiae without bristles except at apex, middle tibia? each 

 bearing two near middle and three-fourths of the posterior side, hind 

 ones bearing two below middle of anterior-inner and two near middle 

 of anterior-outer side; wings h^'aline, veins yellow, bare, fourth vein 

 diverging from the third, hind crossvein nearly straight, small cross- 

 vein near two-thirds length of discal cell, costal spine wanting; calyp- 

 tei'es yellowish white; length, nearly 5 nmi. Two males and one 

 female. 



nah!tat.—\lo\xy\\\Q County, Quebec, Canada (May 24, 1900, Mr. G. 

 Chagnon), and St. Louis, Missouri. 



Tyjje.—C^t. No. 023!l, U.S.N.M. 



CHIROSIA CAPITO, new species. 



Male. — Black, the lower part of the front, extending along sides 

 of facial ridges nearly to their lower ends, the halteres and leases 

 of tibiie 3'ellow; face and frontal orbits whitish pruinose, front at nar- 



