NO. 1935. MU8C0ID FLIES FROM SOUTH AMERICA— TOWNSEND. 349 



parafrontals pollinose but showing pollen only in oblique view. 

 Antennae reddish-yellow, arista and third joint except base blackish 

 or brown. Palpi pale brownish-yellow. Occiput ashy. Pleurae 

 silvery-cinereous, the mesoscutum less thickly so. Four sternopleural 

 bristles, the end ones very strong, the intermediate ones weak; four 

 postsutural bristles. Scutellum of the same leaden ground color as 

 mesoscutum, brownish-yellow on margin, pollinose basally, with 

 four strong marginal pairs of bristles, and a subapical erect nonde- 

 cussate very short pair; discal pair weak and hardly distinguishable 

 in some cases. First abdominal segment dark brown, second seg- 

 ment brown with the basal portion silvery-cinereous pollinose, the 

 third segment thickly golden-yellow pollinose leaving the posterior 

 margin brown, anal segment entirely densely deep golden pollinose. 

 A weak pair of median marginal bristles on first abdominal segment 

 in both sexes, a much stronger median marginal pair on second seg- 

 ment, marginal row on third and fourth segments. Legs blackish. 

 Wings faintly infuscated throughout, more distinctly so on costal 

 margin. Tegulae whitish, faintly yellowish on margins. 



Type.— Cat. No. 15191, U.S.N.M. Female. October 28, 1910; 

 TD 3969, e. 



Deposits black microtype eggs on foliage. 



BELVOSIA PIURANA, new species. 



Belvosia piurana Townsend, Ann. Ent. Soc. Amer.. vol. 4, 1911, p. 143. — 

 TD 4032. 



Length of body, 13 to 14 mm.; of wing, same measurement. 

 Numerous males and females, Piura, Peru, October 30 and 31 and early 

 part of November, 1910, on flowers of species of Mikania, and Sullana, 

 in the valley of the Rio Chira, on flowers of PJiiliherteTla Jlava, an 

 asclepiadaceous vine. 



Black, the entire head white-silvery pollinose, only the occiput and 

 parafrontals with dark ground color showing through the pollen, and 

 frontalia reddish-brown in a direct view. Antennae brown, the first 

 two joints and base of third more or less distmctly reddish-yellow. 

 Palpi reddish-yellow. Hair of occiput white. Thorax faintly silvery 

 pollinose, the pollen only showing in oblique view. Scutellum pale 

 reddish-brown. Abdomen black, the second segment very narrowly 

 margined with silvery pollen anteriorly, the third segment more 

 widely so, the fourth segment wholly silver}^ pollinose excepting only 

 the spinose apex. Some indiAaduals show a pale golden shade to the 

 pollen, while in others it is pure silvery- white. Legs black. Wings 

 smoky throughout. 



Type.—Csit. No. 1.5192, U.S.N.M. Female, Sullana, April 12, 191 1 ; 

 TD 4032, ch., m. 



Deposits black microtype eggs on foliage. 



