73 
2. Abdomen black, sides of first two segments and usually the front 
corners of the third, yellowish, front femora almost wholly 
black, three sternopleural macrochietie; length,6mm. Colorado 
and southern California. (Jour. Acad. Nat. Sci. Philadelphia, 
Vol. VI, p. 173; 1829: Ocyptera. Stevenia pictipes Bigot, Ann. 
OG. MNGwr LANCE, Ds 204°" LOS8.) oe tr ke Se oc. arcuata Say. 
Abdomen wholly yellow, front femora broadly yellow at the base; 
two sternopleural macrochete; length, 6 mm. Northern Vir- 
ginia. (Jour. Acad. Nat. Sci. Philadelphia, Vol. VI, p. 172; 
1829: Phasia. Tachina corythus Walker, List of Dipterous 
Insects, Part IV, p. 797; 1849. Wahlbergia atripennis Town- 
send, Proc. Ent. Soc. Washington, Vol. I, p. 145; April 2, 
ES Oey ere te kaa af) = Bs ors eee ee oe eed teh atripennis Say. 
Genus HEMYDA Desv. 
Hemyda Desvoidy, Essai sur les Myodaires, p. 226; 1830. 
Our single species is black, the palpi, humeri, a large spot on each 
side of the second abdominal segment at the middle, the front corners 
of the third segment, the cox, tibiwe and a large portion of the femora, 
yellow; three postsutural and one sternopleural macrochiwete, scutellum 
bearing three marginal pairs; frontal vitta highly polished; length, 
Riemim:. .Vorthern Illinois: (Loc. cit.)..-.-.-..-..c2---- aurata Desv. 
Genus BESKIA Br. and Berg. 
Beskia Brauner and Bergenstamm, Zweif. Kais. Museum Wien, IV, p. 139; 1889. 
Ocypterosipha Townsend, Journal N. Y. Ent. Soc., Vol. II, p. 79; June, 1894. 
This synonymy has already been published by Dr. Williston.! The 
type species is black, the abdomen yellow, calypteres white, wings 
smoky, three postsutural and three sternopleural macrochetie; length, 
6mm. Boykins, Va.; Tifton, Ga.; and Texas. (List of Dipterous 
‘Insects, Part IV, p. 796; 1849: Tachina. Beskia cornuta Brauner and 
Bergenstamm, Zweif. Kais. Mus. Wien, IV, p. 170; 1889. Ocyptero- 
sipha willistont Townsend, Journal N. Y. Ent. Soe., Vol. I, p. 79; 
il hy LS ISO Reg sta eee Slr St car ee ee ea clops Walk. 
. Genus ISOGLOSSA Cog. 
Isoglossa Coquillett, Canadian Entomologist, Vol. XX VII, p. 125; May, 1895. 
The type species is black, the palpi, sides of last three abdominal 
segments except the hind margins of the second and third, and the 
apex of the abdomen, yellow; three postsutural and three sternopleural 
macrochete; length,6 mm. From the type specimen. Los Angeles 
Smee al. (loc. Clt., ps 126.)....... 2.225222. oe hastata Coq. 
'Manual N. Amer. Diptera, p. 149; 1896. 
