NO. 1935. MU8G0ID FLIES FROM SOUTH AMERICA— TOWNSFND. 343 



low when the pollmose covering is destroyed. Frontalia and an- 

 teniise dark brown. Palpi pale reddish-yellow. Pleurae thinly cin- 

 erous. Mesoscutum thinly silvery, with a median pair of narrow 

 black vittse and an outer vitta broken by suture, presutural portion 

 of latter broader. Scutellum light brownish-red, blackish on base, 

 tliinly silvery. Abdomen soft dark brown, faintly silvery on bases 

 of second and third segments, the silvery broadening on sides of seg- 

 ments, widely silvery on base of anal segment and on bases of ventral 

 portions of other segments. The sides of abdomen are reddish in 

 male. Legs black to dark brown, tibiae reddish. Wings rather 

 deeply yellowish-smoky in the costo-basal region of the long veins. 

 Tegulse whitish, yellowish on borders. 



Type.— Ceit. No. 15182, U.S.N.M. Female; TD 3928, e., ch. 



CILETOPHOROCERA FUSCOSA, new species. 



Length of body, 9 mm.; of wing, 9 mm. One female, canyon of 

 the Rio San Gaban at Uruhuasi bridge, February 3, 1910, on flowers 

 of species of Baccharis. 



Differs from preceding species as follows: General color darker. 

 Scutellum entirely black. Abdomen dark brown to black, the anal 

 segment wholly silvery pollinose, the third segment with only the 

 faintest trace of pollen laterally on anterior margin. Legs black 

 except the reddish tibise, wings more deeply smoky on costal third 

 or more, and tegulse distinctly smoky. Palpi reddish-yellow, or 

 rust-yellow. 



Type.—C&t. No. 15183, U.S.N.M. TD 3960. 



Sxabfainily SALMiA-CIIlSr^. 

 Genus PHASIATACTA Townsend. 

 Phasiatacta Townsend, Ann. Ent. Soc. Amer., vol. 4, 1911, pp. 144, 329. 



Female front three-sevenths, male front one-tliird of head-width. 

 Female with one proclinate and two reclinate orbital bristles; male 

 with one reclinate. Ocellar bristles strong, reclinate. Front with 

 three rows of bristles on each side; parafacials with short bristles, 

 more developed in male. Facial plate plus facialia fully as wide as 

 the two parafacials. Oral margin abruptly and narrowly produced, 

 vibrissse well above same, few bristles above vibrissse. Second 

 antennal joint elongated in both sexes, the third slightly longer. 

 Arista moderately short, bowed, thickened thi'oughout; second jomt 

 elongate, two or three times as long as wide. Eyes bare. Proboscis 

 stout but horny, part below geniculation equal to that above, entire 

 length exceeding head-height. Palpi slender, strongly bowed at the 

 slightly thickened ends. Cheeks same width as parafacials. Eyes 

 descending nearly or quite to level of oral margin. 



