TAXONOMY OP MUSCOIDEAN FLIES — TOWNSEND 93 



Poliophrys sierricola, sp. nov. 



One male, Sierra Madre, Chihuahua, collected by Townsend. 



Length, 9 mm. ; of wing, y]/ 2 mm. Blackish, clothed with silvery 

 cinereous. Parafrontals with a golden tinge (male), which extends 

 very faintly on parafacials and cheeks. Facial plate silvery. 

 Frontalia seen from in front silvery, seen from behind brownish. 

 Antennae brownish, third joint blackish and three times as long as 

 second, arista blackish. Palpi yellowish. Thorax silvery pollinose, 

 with four moderately wide vittae, which are blackish seen from be- 

 hind, but salmon colored seen from in front. Scutellum light 

 brownish reddish, blackish at base, silvery. Abdomen silvery, 

 slightly marmorate above, with a faint golden tinge which is strong 

 on anal segment, where it is about the same as on parafrontals. 

 Sides of abdomen faintly reddish under the pollen. Wings clear, 

 tegulae whitish. Legs blackish, femora silvery ; tibiae reddish or 

 brownish yellow, except at ends ; pulvilli slightly smoky. 



Type.— Cat. No. 10,908, U. S. N. M. 



A female from same locality differs only in second antennal joint 

 being clear reddish yellow, the third joint little more than two and 

 one-half times as long as second, and the sexual characters given 

 above under the genus. It may prove to be a distinct species, but 

 more material is needed to make sure of this. 



Poliophrys organensis, sp. nov. 



Four males, Organ Mountains, New Mexico, Townsend, Coll. 



Length, 8 to 10 mm. ; of wing, 6 to 7.5 mm. Front fully one- 

 third head width at vertex, cheeks more than one-third eye height 

 in width. Differs further from P. sierricola in having hardly a 

 tinge of golden to the pollinose covering of head, which is silvery 

 white throughout face and with only a slight tinge of golden on 

 parafrontals not extending on facial plate at all. Antennae black, 

 third joint nearly four times as long as second (male). Abdomen 

 more noticeably reddish on sides ; anal segment less distinctly 

 golden, about the same as other segments. 



Type.— Cat. No. 10,909, U. S. N. M. 



PHRISSOPOLIA, gen. nov. 



This genus is proposed for ProspJierysa crebra van der Wulp, 

 which was included in Chcetogcedia by Brauer and von Bergen- 

 stamm. It is characterized by a double row of frontal bristles, the 

 outer row nearly or quite as strong as the other, and especially by a 

 row of strong bristles on parafacials close to orbit, the facio-orbital 



