192 KANSAS UNIVERSITY SCIENCE BULLETIN. 



the furcation of the second and third veins than to the hind 

 cross-vein. Length, 1.7 mm. 

 Numerous specimens ; October. 



OsciNis. 



(Latreille, Nouv. Diet, d' Hist. Nat., XXIV, 196; 1804.) 



Oscinis polita, n. sp. 



Front opaque black, narrow anterior border with a yellowish 

 cast, bristly hairs on sides and in front short, triangle shining 

 black, large, almost reaching the antenna?, and nearly con- 

 tiguous with eyes above; face, cheeks and occiput black, with 

 grayish reflections, vibrissse present ; antenna^ and mouth- 

 parts black. Thorax black, mesonotum and scutellum sub- 

 opaque, grayish pubescent, former with two posthumeral and 

 two supraalar bristles, latter somewhat shortened and convex, 

 with four bristles ; halteres yellow. Abdomen subopaque 

 black. Legs black, knees, tibiae, and tarsi, except their tips, 

 yellow. Wings hyaline, with a slight grayish tinge, second 

 and third sections of costa of about equal length. Length, 1.5 

 mm. 



One specimen ; May. 



Oscinis basilaris, n. sp. 



Front opaque brown above and yellow below, with black 

 bristly hairs on sides and in front, triangle shining black, 

 reaching two-thirds to antennae; face light brown, with a low 

 median carina, vibrissae present; cheeks narrow, yellowish, in 

 certain lights silvery ; occiput black, covered with grayish pol- 

 len ; antenna:^ wholly black ; proboscis brownish black, palpi 

 yellow, clypeus black. Thorax black, largely shining, humeri, 

 pleura^ partially, and sides of scutellum yellowish, mesonotum 

 and scutellum with a thin coat of grayish pubescence, latter 

 with an apical pair of bristles, a shorter, hair-like bristle on 

 each side ; halteres yellow. Abdomen brownish black, shining, 

 two basal segments largely yellowish. Legs yellow, all femora 

 and tibiffi with a brownish cast near the middle, last two joints 

 of tarsi fuscous. Wings hyaline, second and third sections of 

 costa of about equal length. Length, 1.9 ram. 



Two specimens ; October. 



