132 



the second, arista tliickened on the basal fourth, sides of face 

 each bearing a single row of macrochaitie, cheeks one-tbiirth as 

 wide as the eye height; scutellum bearing three pairs of long 

 marginal inacroch«t;e ; abdomen opaque gray pollinose, with 

 darker reflecting spots, first and second segments with a mar- 

 ginal pair, second and third each with a discal pair, third with 

 a marginal row, and the fourth with tliree rows of macrochtetie ; 

 wings hyaline, third vein bristly halfway to the small crossvein, 

 apical cell short petiolate, calypteres white; length, mm. 

 San Diego, Tex. A female collected May 2, 1895, by E. A. 

 Schwarz. Type No. 3639, IT, S. National Museum .pulverea n. sp. 



4. Scutellum bearing only two pairs of long marginal macrochaitse, cos- 

 tal spine much longer than the small crossvein; length, 8 to 9 

 mm. Westville, N. J,; Potomac Creek, Va.; Tifton, Ga., and 

 Florida. (Trans. Amer. Ent. Soc, Vol. XIX, p. Ill ; May, 1892 : 



Sarcotdchinella.) intermedia Town. 



Scutellum bearing three pairs of long marginal macrochicke, costal 

 spine noticeably shorter than the small crossvein; length, (3 to 

 8 mm. Cumberland County, N. J ., and southern Illinois. (Trans. 

 Amer. Ent. Soc, Vol. XVIII, p. 366; December, 1891: Lacco- 



prosopa.) sarcophaghiaTowu. 



Unrecognized species. — B.( ?) macropogon Bigot, Ann. Soc. Ent. France, 



p. 259; 1888. California. 



Genus EUTHYPROSOPA Town. 



Euthyprosopa Townsend, Trans. Amer. Ent. Soc, Vol. XIX, p. 106; May, 1892. 



Our single species is black, the antenniiB, middle of face, lower part 

 of head, the palpi, corners of thorax, scutellum, hind margin of each 

 segment of abdomen, apices of femora and the tibite, yellow; three post- 

 sutural and two sternopleural macrochaetje ; length, 7 mm. From a 

 cotype specimen. Las Cruces, X. Mex. (Loc. cit., p. 107.) .petiolata Town. 



Genus GONIA Meig. 



(ionia Meigen, in lUiger's Magazin fiir lu.sekknkiuulo, \'ol. II, p. 280; 1803. 



lihedia Desvoidy, Essai sur les Myodaires, p. 74; 1830. 



Ilvaumuria Desvoidy, loc. cit., p. 79. 



Isomcra Desvoidy, Aunales Soc. Ent. France, p. 315; 1851. 



Pinsemy a DesYoidy, loc. cit., p. 318. 



Desvoidy proposed the name lihedia for the genus (xonia, errone- 

 ously stating that the latter term had been previously used in Cou- 

 chology; and in the Annales Soc. Entomol. France, second series, 

 \). 309, he states tliat his genus Keaumuria contains the males, and 

 Khedia tlie females, of the same species. The synonymy of Isomera is 

 by Schiner,' and that of Pissemya is by Brauer and Bergenstamm.^ 



'Fauna Austriaca, Vol. I, p. 441; 1862. 

 ^Zwoif. Kais. Mue. Wien, VI, p. 235; 1893. 



