NO. 2152. NEW MUSCOID FLIES— TOWNSEND. 309 



sternopleurals, three postsuturals. Apical cell ending almost in 

 wing-tip; hind cross vein crooked and nearly in middle between 

 small cross vein and cubitus. Tarsi rather tapered. First and third 

 veins bristled same. 



MUMIMYIA CINCTA, new species. 



Length of body, 5 mm.; of wing, 4 mm. One male, Miami, Florida, 

 November 12, 1908 (Townsend). TD869. 



Palpi and first two antennal joints fidvous; frontaha dark rufous. 

 Third antennal joint blackish, more or less fulvous on lower border 

 and base. Face, cheeks, parafrontals and orbits silvery, occiput 

 ashy. Thorax blackish, rather thinly silvery, two narrow inner 

 vittae, outer vittae heavy; postsutural dorsum appearing black from 

 rear view, but showing lateral margin and broad hind border silvery- 

 white. Scutellum faintly poUinose, but appearing blackish from be- 

 hind. Abdomen dark brownish, the anal segment rufous; the nar- 

 row bases of intermediate segments silvery-white, the same silvery 

 showing less distinctly on base of anal segment. Legs fulvous; tibiae 

 rufous-brown, tarsi black. Wings nearly clear, the basal and costal 

 cells hghtly infuscate. Hind scale of tegulae smoky-translucent; 

 front scale white. 



Holotype.— No. 20035, U.S.N.M. 



Family MINTHOIDAE. 

 ZOSTEROPSIS, new genus. 



Genotype. — Zosteropsis rutJierfordi, new species. 



Differs from Zosteromyia as follows, Male. Vertex and posterior 

 half of front about one-sixth of head-width, the anterior half of front 

 sUghtly widening from same. Frontalia much narrowed posteriorly, 

 averaging a little wider than one parafrontal. Ocellars hair-like 

 and vestigial; all the other bristles of front and vertex strong, not 

 hair-hke. Outer verticals not developed. Fom- rechnate orbitals 

 on each side in hne with frontals and occupying about posterior 

 three-fourths of front; frontals descending about to end of second 

 antennal joint. Third antennal joint narrower. Facial plate and 

 faciaha normal, not smoothed; epistoma emarginate. Head more 

 flattened, occiput not bulged below; eyes normal, their posterior 

 margin not beveled off on lower extent. Three sternopleurals, the 

 middle one weak. Middle one of the three lateral scutellars strong, a 

 decussate apical pair of hair-like bristles. No long hairs on abdomen, 

 macrochaetae not so long; no discals on intermediate segments, median 

 marginal of first segment vestigial. Legs not so elongate, more slen- 

 der. Wings not bulged on costal cells; apical cell very narrowly 

 open to nearly closed well before tip, apical cross vein deeply bowed 



