132 
the second, arista thickened on the basal fourth, sides of face 
each bearing a single row of macrochetie, cheeks one-fourth as 
wide as the eye height; scutellum bearing three pairs of long 
marginal macrochetie; 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 three rows of macrochiete ; 
wings hyaline, third vein bristly halfway to the small crossvein, 
apical cell short petiolate, calypteres white; length, 6 mm. 
San Diego, Tex. <A female collected May 2, 1895, by E. A. 
Schwarz. Type No. 3639, U.S. National Museum .pulverea n. sp. 
4, Seutellum bearing only two pairs of long marginal macrochete, 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. 111; May, 1892: 
Narcotachinella.\ poe sae ee Os aoe ee eee intermedia Town. 
Seutellum bearing three pairs of long marginal macrochietie, costal 
spine noticeably shorter than the small crossvein; length, 6 to 
Smm. Cumberland County, N.J.,and southern Illinois. (Trans. 
Amer. Ent. ary Vol. XVIII, p. 366; December, 1891: Lacco- 
DT OSOPG| Xn 8 Saige bE Son ee Oe on eee sar ae Town. 
Unrecognized species. = (?) 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 antennw, 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 tibiz, yellow; three post- 
sutural and two sternopleural macrochietie; length, 7 mm. From a 
cotype specimen. Las Cruces, N. Mex. (Loe. cit., p. 107.) .petiolata Town. 
Genus GONIA Meig. 
Gonia Meigen, in Illiger’s Magazin fiir Insektenkunde, Vol. II, p. 280; 1803. 
Rhedia Desvoidy, Essai sur les Myodaires, p. 74; 1830. 
Reaumuria Desvoidy, loc. cit., p. 79. 
Isomera Desvoidy, Annales Soc. Ent. France, p. 315; 1851. 
Pissemya Desvoidy, loc. cit., p. 318. 
Desvoidy proposed the name Rhedia for the genus Gonia, errone- 
ously stating that the latter term had been previously used in Con- 
chology; and in the Annales Soc. Entomol. France, second series, 
p. 309, he states that his genus Reaumuria contains the males, and 
Rhedia the females, of the same species. The synonymy of Isomera is 
by ees 'and that of Pissemya is by Brauer and A ereens tau 
imanne perience, Vol. Tp: fair 1862. 
2Zweif. Kais. Mus. Wien, VI, p. 235; 1893, 
