42 INSECUTOR INSCITlit MENSTRUUS 



NEW MUSCOID FLIES, MAINLY HYSTRICIIDi^ AND 

 PYRRHOSIIN/E FROM THE ANDEAN MONTANYA 



By CHARLES H. T. TOWNSEND 

 Director of Entomological Stations, Lima, Peru 



(Continued from page 32) 



Corpulentosoma cornutum, new species. 



Length of body, not including bristles, 9 mm. ; of wing, 8 mm. Two 

 males, Uruhuasi Bridge, San Gaban Canyon, about 6,500 feet, Febru- 

 ary 3 and 15, 1910, on flowers of Baccharis sp. 



Whole face and cheeks silvery-white poUinose, occiput cinereous ex- 

 cept pale straw-colored lower area, parafrontals very dark greenish and 

 thinly poUinose, frontalia light yellowish-brown, antennae and arista 

 wholly black. Occipital pile gray ; the sparse short hairs of cheeks, 

 parafacials, and parafrontals black. Entire pleurae pale rust-yellow or 

 pale yellowish-red, entire abdomen and legs deep yello wash-red. Tho- 

 racic scutum of the same very dark greenish as parafrontals, thinly silvery 

 poUinose, four heavy vittae very faintly defined. Scutellum concolorous 

 with thoracic scutum at base and sides, its disk and apex obscure pale 

 reddish-yellow. Wings evenly deeply infuscate throughout, without any 

 yeUowish whatever at base ; tegulae snow-white in both scales, also 

 alulae of wing narrowly white. 



Trichophoropsis, new genus. 



Allied to Trichophora, Vihrissomyia, and Andinom^ia, but has 

 thickly-hairy eyes, long oral profile, rather short proboscis, long well- 

 developed palpi, basal aristal joints both long and equal, front tarsi of 

 female widened, no facio-orbital bristles, no dorsal macrochaetae on first 

 two abdominal segments in female, hind crossvein close to apical cross- 

 vein, fourth vein continued in strong stump beyond apical crossvein. 

 Described from both sexes. 



Front of female at vertex about one and one-fifth times greatest eye- 

 width, evenly widening into face, the latter at lower border of eyes being 

 about twice greatest eye-width. Male front at vertex hardly three-fifths 

 of greatest eye-width, evenly widening as in female into the wide face. 

 Frontal bristles descending very low, to point one-half way between 

 antennal and vibrissal insertions ; strong bristles outside frontal row in 

 male giving appearance of three frontal rows anteriorly ; the outer bristles 



