49 



Sci. Philadelphia, Vol. VI, p. 172; 1829. TricUopocla flavicornis ^—^ ■ 



Desvoidy, Esaai sur les IMyodaires, p. 284; 1830. Trichopoda ^^ ■ 



pyyrhogaster Wiedemann, Aussereur. Zweif. Ins., Vol. II, p. 272; ^'k . 

 1830: also Brauer and Bergenstamm in Hit.). . . .pennipes Fabr. 



y Genus EUSIPHpNA, new genus. 



The principal clwacters of this genus ifmy be gathered from the fol- 

 lowing description of the type species: Front of female uearly one-half 

 as wide as either eye, ocellar bristles directed obliquely forward, froutal 

 bristles weak, disposed iu four rows, not descending beneath base of 

 antenna^, front, including the vittn, gray i^ollinose; 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; vibrisste 

 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 vibrissie ; cheeks extremely narrow, scarcely apparent; pro- 

 boscis bristle like, longer than the entire insect, genicnlate in the middle, 

 the apical half folding beneath the basal half; labella absent, palpi 

 clavate, reaching about halfway to the anterior oral margin; antennjB 

 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 sliorter than broad; eyes bare; thorax lightly gray 

 pollinose, anterior Jialf of middle of dorsum destitute of macrochaitpe, 

 two postsutural and two sternopleural macrochajtie, the latter near the 

 posterior end of the sternopleura, no other macroch.netre on the pleura; 

 scutellum subtriangular, bearing fonr marginal macrocha-tie ; abdomen 

 and legs destitute of macrocha?t<ie and of pollen; wings hyaline, veins 

 bare, apical cell open at the extreme wing tip, last section of fonrth 

 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 antenna^, and the anterior oral margin yellow; calypteres 

 small, white; length, 5 mm. Indiana and Colorado. Two female speci- 

 mens. Type No. 3520, IT. S. National Museum mira n. sp. 



Genus GYMNOPHANIA Br. and Berg. 



Gymnophania Brauer and Bergenstamm, Zweif. Kais. Mus. Wien, IV, p. 143; 1889. 



Our single species is black, the antenna^ and legs tinged with brown ; 

 front in male slightly narrower than width of the lowest ocellns, 

 antenna} 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 

 macrochjcta, scutellum bearing two marginal pairs, abdomen and legs 

 destitute of macrochu'ta^ ; wings hyaline, the costal margin beyond tip 

 3359— No. 7 4 



