Nov., '04] ENTOMOLOGICAL NEWS. 303 



Descriptions of New Oscinidae. 

 BY C. F. ADAMS. 



Zoology Building, University of Chicago, Chicago, Illinois. 



In some preliminary studies of the Hough collection of 

 Diptera, now in the University of Chicago, I . have come 

 across some new forms of Oscinidic, the description of which 

 I take pleasure in presenting here. The one described under 

 the name of pidla belongs to the subgenus Chloropisca , and is 

 close to my haltcralis from Arizona. Those under the names 

 of lasdva.rubrimttata, aniin/ata, and certima belong to Chlo- 

 rops, sens. str. , the last named standing close to aristalis Coq., 

 and the others near pnbescens Loew, and palpalis Adams. 



Chlorops pulla n. sp. 



Head reddish yellow, frontal triangle shining black, punctate on the 

 margins, sides converge gradually, and reach the anterior edge of the 

 front, which slightly overhangs the base of the antennas ; latter black, 

 reddish on lower margins, third joint orbicular, arista dark yellowish ; 

 facial ridges tinged with brown, clypeus black, palpi very small, brown- 

 ish black, proboscis concolorous ; upper half of occiput black. Mesono- 

 tum very dark reddish brown, shining, with three large and two small 

 black vittre, of the former the middle one is short, reaching from anterior 

 margin to middle of mesonotum, the other two reaching from the pos- 

 terior margin nearly to the humeri. the humeri largely shining black ; 

 pleura reddish yellow, a large and indistinct spot below and before the 

 base of the wing, and the lower half of the sternopleura black ; scutel- 

 lum same same color as mesonotum ; halteres yellow. Abdomen sub- 

 shining black, tip reddish yellow. Legs shining black, tip of coxae, and 

 knees reddish, tarsi fuscous. Wings hyaline, veins brown, third and 

 fourth slightly divergent, hind cross vein twice its length from the small 

 cross vein. Length 2.5 mm. 



Two specimens. Colorado. 



Chlorops lasciva n. sp. 



A rather robust species, reddish yellow, abdomen reddish brown cen- 

 trally, the incisures brown. Third antenna! joint, lower angle and lateral 

 margins of triangle, ocellar dot, two triangular vittze on upper part of 

 occiput, and palpi black. Arista whitish, base yellow ; median carina of 

 face rather prominent. Thorax with three shining black vitUu, ami a 

 very indistinct strigula above each winy, median vitta reaching two- 

 thirds way to posterior margin and latteral vitlaj reaching only three- 

 fourths ; pleura, humeri, and scutellum immaculate, metanotum black, 

 halteres light yellow. Second abdominal segment with a black spot in 

 each anterior angle. Legs yellowish, tips of tarsi fuscous. Wings hya- 

 line, third and fourth veins slightly divergent, hind cross vein twice its 

 length from the small cross vein. Length 3.4 mm. 

 One specimen. Opelousas, La., March. 



