NO. 1935. MUSCOTD FLIES FROM SOUTH AMERICA— TOWNSEND. 331 



yellow. The abdomen bears a complete median vitta of the same 

 golden-silvery pollen as that of face and cheeks, crossed by a broad 

 fascia of the same pollen occupying slightly more than anterior one- 

 half of fourth segment, and leaving two brown areas on posterior 

 half of same. The broad median disk of lu-st segment is brown, as is 

 also a broad area bordering the median vitta on second segment and 

 a more or less well defined area bordering vitta on third segment ; the 

 rest of abdomen is deep yellowdsh-red, extending broadly on venter. 

 Hypopygium yellowish-red. Legs brown, tibiae reddish. Wings 

 evenly and lightly infuscated, the long veins yellowish, the crossveins 

 blackish. 



Type.~C&t. No. 15169, U.S.N.M. 



ARCHYTAS INCASANA, new species. 

 Archytas, sp. Townsend, Ann. Eut. Soc. Amer., vol. 4, 1911, p. 132. — TD 3989. 



Length of body, 12 to 13 mm.; of wing, 9 to 10 mm. Numerous 

 specimens of both sexes, Piura, Peru, at nearly all times of year, on 

 flowers of Spilanthes, sp., Mikania, sp., and others, and on foliage. 

 Most numerous in November. The males run a little smaller than 

 females. 



Head silvery-white, the parafrontals in female of a distinct golden 

 shade, those of male usually silvery-cinereous but sometimes slightly 

 golden. Occiput silvery, the pile yellowish-gray to golden. Palpi 

 light reddish-yellow, first two antennal joints and base of third nearly 

 same shade or slightly darker, rest of tliird joint and all of arista dark 

 brown. Frontalia pale honey-yellowish. Pleurge faintly brassy on 

 the dense cinereous pollen; mesoscutum of female deeply golden 

 pollinose, that of male less so and often silvery without brass}'- shade, 

 the usual four very faint vitta?, scutellum wholly pollinose. Abdo- 

 men shining metallic bluish-black, the last segment wholly silverv- 

 white pollinose in male, with a faint tinge of brassy in female, but 

 appearing blackish in obhque view. Scutellum with two strong and 

 two shorter marginal bristles, a weak decussate apical pair, and an 

 erect short stout pair immediately in fi*ont of last, also discal short 

 bristles; of the marginal ones the basal one is shortest. Legs wholl}'- 

 blackish. Wings clear, brownish-yellow on costo-basal area, the 

 color mostly following the long veins. Tegulse white. 



Type.— Cht. No. 15170, U.S.N.:M. Female, November 8, 1910; TD 

 3989,/. r. s. 



Cotype, female, June 19, 1910; TD 3908, w., cph. sl\ 



Deposits colored maggots on foliage. 



