364 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 43. 



EUSELENOMYIA, new genus. 



Differs from Selenomyia in the macrochsetse being only marginal, 

 the cheeks only about one-fourth of eye-height in female and about 

 one-third in male. Parafacials hairy. Front nearly same width in 

 both sexes, slightly narrower near vertex in male. Both sexes with two 

 strong proclinate orbital bristles. Male with long claws and pulvilU, 

 the female with shorter claws. Only one row of frontal bristles on 

 each side. Antennae inserted on or below eye-middle. Eyes bare. 

 Arista short, swollen at base. Antennae short. Facialia bare. 

 Fourth vein with wrinkle at end. Differs from ParaTrmcronycliia in 

 anterior tarsi of female not being dU&ted. 



Reproductive habit, larviposition from a double-sac uterus. 



Type-species. — Euselenomyia peruviensis, new species. 



EUSELENOMYIA PERUVIENSIS, new species. 

 iSeZenomyia, sp.TowNSEND, Ann. Ent. Soc. Amer., vol. 4, 1911, p.l30.— TD 3998. 



Length of body, 5 to 6.5 mm.; of wing, 4 to 5.5 mm. Numerous 

 specimens of both sexes, Piura, Peru,' November 12 and 13, 1910, on 

 fohage. 



Whole body cinereous pollinose, the face and front with a distinct 

 golden shade in female, a dusky-golden shade in male. Antennse 

 wholly dark brown; frontalia 'brown in a direct view, golden in 

 oblique view. Palpi yellowish or reddish, dusk}^ on tip. Pollen of 

 thorax and abdomen mth a faint j^ellowish tinge, the usual vittse on 

 mesoscutum, the usual marmorations on abdomen. Two strong ster- 

 nopleural bristles, a bunch of small bristles between them; three 

 postsutural bristles. Scutelluin with two lateral pairs and an apical 

 decussate pair of bristles, all long; also a very short discal pair. 

 First abdominal segment in male with a median marginal pair of 

 macrochaetaj, which are either lacking or atrophied in female; second 

 segment in both sexes with a median marginal pair, and third and 

 fourth segments with a marginal row each. Legs black, wings .clear, 

 tegulae watery- whitish. 



Type.— C&t. No. 15209, U.S.N.M. Female, November 13, 1910; 

 TD 3998. 



Family MEGAPROSOPID^. 



Subfamily jyEEG-APROSOPIN'.aE. 

 PERUA, new genus. 



Differs from NeopJiyto by having the frontal bristles strong, fourth 

 vein continued in a stump beyond apical crossvein, hind crossvein 

 nearer to apical crossvein, and no discal bristles on intermediate 

 abdominal segments; also in being decidedly more robust and melanic. 

 The apical cell is narrowly open in wing-margin. The arista is bare, 



