No. 2301. NEW SPECIES OF MU8C0ID FLIES— TOWNSEND. 553 



PTERINOPTERNA, new genus. 



Genotype. — Pterinopterna ciliata, new species. 



Clypeus considerably sunken, not twice as long as wide. Epistoma 

 well warped. Facialia bare. Proboscis short; palpi clubshaped, 

 reaching epistoma. Third antennal joint about twice second. 

 Arista short, thinly long-plumose. Eyes thickly pilose. Frontals 

 stopping at base of antennae. No proclinate fronto-orbitals in male. 

 Ocellars present. Parafacialia wider than clypeus, thickly black- 

 pilose on outer lower part. Cheeks over two-fifths eye length. 

 Two postintraalars, preacrostichals and postacrostichals ; three sterno- 

 pleurals and lateral scutellars; four postsuturals. No apical scutel- 

 lars. Third vein bristled only at base, others bare. Apical cell open 

 some distance before tip. A very short stump at cubitus. Hind 

 crossvein nearer to cubitus. Hind tibiae quite thickly and evenly 

 cihate with ordinary bristles ; hind metatarsi pliunose with fine hairs 

 on each side, a double series of long hairs on outer edge and a single 

 series of shorter hairs on inner edge. No median marginals on first 

 segment, a short appressed pair of median marginals on second, a 

 strong erect pair of median marginals on third, marginal row of erect 

 on anal segment. 



PTERINOPTERNA CILUTA, new species. 



Length, 10 mm. One male, Huascaray Ridge, Jaen Province, 

 Peru, 7,000 feet, September 22, 1911 (C. H. T. Townsend). 



Blacldsh, abdomen widely rufous on sides. Face, including para- 

 faciaha and anterior half or so of cheeks, bronze pollinose; rest of 

 cheeks and occiput gray pollinose. Frontalia and parafrontaiia soft 

 brownish-black. Antennae brown, third joint reddish at base. 

 Plem*a thinly silvery. Mesoscutum more thickly silvery; with five 

 black vittae, of which the next to outer one on each side is narrow, 

 subconfluent with the median vitta and gives out a little behind 

 suture. The three main vittae are heavy, uninterrupted at suture, 

 and narrowly edged with bronze pollen. Scutellum bronze pollinose 

 in a discal triangle, more silvery laterally. Abdomen rufous; median 

 depression of first segment, median vitta, hind border of third segment 

 and most of anal segment dark brown to blackish; front borders 

 of last three segments narrowly silvery, widening in oblique view 

 on median line; median vitta and anal segment showing bronze to 

 silvery pollen in oblique view. Legs black. Wings clear. Tegulae 

 glassy-infuscate. 



Type.— C&t. No. 22228, U.S.N.M. 



Tribe TRICHODUMNI. 

 TRICHODUROPSIS GUIANENSIS, new species. 



Five females, Bartica, British Guiana (Thiough C. W. Johnson). 

 Differs from recta Schiner as follows: Abdomen and wings colored 

 as in Trichodura anceps Wiedemann. Thorax has the median light 



