NO. 1935. MU8C0ID FLIES FROM SOUTH AMERICA— T0WN8END. 355 



bristles. Scutellum with two long marginal pairs of bristles, a shorter 

 decussate apical pair and a discal pair equal to last. 



Reproductive habit, larviposition of white maggots in choria where 

 they can reach host. 



Type-species. — Aglummyia percinerea, new species. 



AGLUMMYIA PERCINEREA, new species. 



Almugmyia major Townsend, Proc. Ent. Soc. Wash., vol. 13, 1911, pp. 154-155 

 [nomen nvdura\. 



Length of body, 6.5 to 7.5 mm. ; of wing, 5.5 to 7.5 mm. Numerous 

 females, Piura, Pei-u, October 18, 1910, to March 15, 1911. Taken 

 only in house, on one occasion at light. 



Deeply cinereous poUinose over whole body, a faint yellowish tinge 

 to the pollen on front, mesoscutum, scutellum, and especially abdo- 

 men. Frontalia pale brownish. Antennse brown, first two joints 

 reddish-yellow. Arista and its short pubescence brown. Cheek- 

 groves broadly reddish-brown, palpi reddish-yellow. First abdominal 

 segment without median macrochsetse ; second segment with a 

 median pair a little removed from hind margin ; third segment with a 

 row of six or eight equally removed from hind margin ; anal segment 

 with a discal row of six or eight, and several apical bristles. All the 

 segments have lateral marginal macrochaetse, and the third segment 

 has also one or more lateral discal bristles. Femora distinctly brown- 

 ish-yellow, the tibiae less so, the tarsi quite dusky. Claws and pulvilli 

 moderately long. Wings nearly clear, tegulse whitish. 



TVpc— Cat. No. 15198, U.S.N.M. Female, November 8, 1910; TD 

 3991, m., cpJi. sic. 



Cotype, female, October 18, 1910; TD 3959, e. 



CESTROPSIS, new genus. 



Body-facies of a Callipliorine, but head rather OEstrid to Dexiid in 

 characters. The description is made from a single male specimen. 

 Front produced, at vertex rather less than width of one eye, widening 

 rapidly forward from posterior third to face. Frontalia greatly 

 widened anteriorly. Eyes bare. Parafacials nearly as wide as long, 

 appearing wider than front at vertex, beset with rather long bristly 

 hairs, which extend on parafrontals. The parafrontals are very wide 

 anteriorly, but greatly narrowed posteriorly. The single row of 

 slender frontal bristles on each side stops about opposite base of 

 antennae. A pair of proclinate ocellar bristles equaling frontals in 

 strength. Cheeks about as wide as eye-height, and including their 

 occipital area longer than wide, bare save for the invading hairs of 

 parafacials and those of the occipital area. The occipital area 

 extends obliquely far forward on cheeks, reaching peristomalia at a 

 point about as far forward as anterior margin of eye. Antennae short, 

 third joint but slightly longer than second. Arista of moderate 



