49 
Sci. Philadelphia, Vol. VI, p. 172; 1829. Trichopoda flavicornis 
Desvoidy, Essai sur les Myodaires, p. 284; 1830. Trichopoda 
pyrrhogaster Wiedemann, Aussereur. Zweif. Ins., Vol. IT, p. 272; 
1830: also Brauer and Bergenstamm in litt.) ... .-pennipes Fabr. = 
Genus EUSIPHONA, new genus. 
The principal characters of this genus may be gathered from the fol- 
lowing description of the type species: Front of female nearly one-half 
as wide as either eye, ocellar bristles directed obliquely forward, frontal 
bristles weak, disposed in four rows, not descending beneath base of 
antennie, front, including the vitta, gray pollinose; sides of face bare, 
gray pollinose, each at narrowest point about one-seventh as wide as the 
median depression, the latter with a distinct median carina; vibrissze 
short, inserted below the level of the anterior portion of the oral margin; 
facial ridges bare, nearly parallel and only slightly approaching each 
other at the vibrissw ; cheeks extremely narrow, scarcely apparent; pro- 
boscis bristle-like, longer than the entire insect, geniculate in the middle, 
the apical half folding beneath the basal half; labella absent, palpi 
clavate, reaching about halfway to the anterior oral margin; antennie 
four-fifths as long as the face, the third joint nearly three times as long as 
the second, suborbicular; arista bare, thickened on the basal third, the 
penultimate joint shorter than broad; eyes bare; thorax lightly gray 
pollinose, anterior half of middle of dorsum destitute of macrochietee, 
two postsutural and two sternopleural macrochetie, the latter near the 
posterior end of the sternopleura, no other macrochetie on the pleura; 
scutellum subtriangular, bearing four marginal macrochete; abdomen 
and legs destitute of macrochete and of pollen; wings hyaline, veins 
bare, apical cell open at the extreme wing tip, last section of fourth 
vein gradually approaching the third, small crossvein near last third 
of discal cell, auxiliary vein lying close to the first and almost united 
with it at the apex. Color, black; the second antennal joint, spot at 
insertion of antenne, and the anterior oral margin yellow; calypteres 
sinall, white; length,5mm. Indianaand Colorado. Two female speci- 
mens. Type No. 3526, U.S. National Museum............ mird ni. Sp. 
Genus GYMNOPHANIA Br. and Berg. 
Gymnophania Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, IV, p. 143; 1889. 
Our single species is black, the antenn and legs tinged with brown; 
front in male slightly narrower than width of the lowest ocellus, 
antenne four-fifths as long as the face, the third joint slightly shorter 
than the second, cheeks one-seventh as broad as the eye height; body 
Shining, not pollinose, only one postsutural and one sternopleural 
macrocheta, scutellum bearing two marginal pairs, abdomen and legs 
destitute of macrochete; wings hyaline, the costal margin beyond tip 
3309—No, 7——4 
