NO. 2115. NEW NEOTROPICAL MUSCOin FLTES—TOWNSEND. 411 



Family SALMACIIDAE. 



PLAGIMASICERA, new genus. 



Genotype. — Plagimasicera j^etiolata, new species. 



Differs from PlagiprospJierysa as follows : Eyes thinly but decidedly 

 hairy. Female front about one and one-half times eye-width ante- 

 riorly, a little narrowed at vertex. Face but little widened from front. 

 Palpi better developed, slender. Scutellum with a weak suberect 

 nondecussate apical pah of bristles, and three strong laterals. Abdom- 

 inal macrochaetae of female discal and marginal. Costal spine con- 

 spicuous. Apical cell long-petiolate, ending far before wing tip, the 

 petiole about half as long as hind crossvein; latter distmctly nearer 

 to cubitus. Differs from CyrtopTileba by second aristal joint being 

 short, parafacials bare, macrochaetae of intermediate abdominal 

 segments discal and marginal. 



Frontals descending to base of third antennal joint. Second 

 antennal joint rather elongate, the third about three times as long 

 as second. Parafacials very narrow below, about twice as wide 

 above. Facialia narrow above, twice as wide below. Facial plate 

 about as wide as facialia plus parafacial of one side. Cheeks about 

 one-third eye-height. Proboscis a little shorter than head-height, 

 very fleshy. Length of head at vibrissae about three-fourths that 

 at antennae. Epistoma distmctly produced. Palpi distmctly but 

 only slightly thickened at tips. .Female with two verticals, the outer 

 one much shorter than the inner one, the two inner ones not decus- 

 sate. Cilia of facialia strong, about six or seven in number, not 

 closely placed, reaching as far up as origin of arista. Third antennal 

 joint of female moderately narrow, equilateral, elongate. Two pro- 

 clinate orbitals in female. A divaricate-proclinate pair of oceUar 

 bristles. Three sternopleurals, the two front ones closely approxi- 

 mated. Three postsuturals. First abdominal segment with a 

 median marginal pair of macrochaetae, second and third segments 

 with median discal pair, second with median marginal pair, third 

 with marginal row, anal with mixed discal and marginal bristles. 

 Hind tibiae of female not ciliate. Thhd vein bristly about halfway 

 to small crossvein. Hind and apical crossveins subparallel. Last 

 section of fifth vein distmctly more than half as long as preceding 

 section. 



PLAGIMASICERA PETIOLATA, new species. 



Length of body, 6 mm.; of wing, 4.25 mm. One female, Chosica, 

 Peru, about 2,800 feet, indoors, June 21, 1913 (Townsend). 



Facial plate and cheeks silvery-gray. Parafrontals pale old-gold 

 pollinose, parafacials and ocellar area with tinge of same. Frontalia 

 fulvo-testaceous. First two antemial joints and broad base of third 



