200 KANSAS UNIVERSITY SCIENCE BULLETIN. 



LiMOSINA. 



( Macquart, Suites a Buffon, II. 571, 8 ; 1835.) 



Limosina marginata, n. sp. 



Male and female : Front reddish yellow, ocellar dot and ver- 

 tex black ; orbits of a grayish luster ; three frouto-orbital 

 bristles, all curving backward, the upper one large ; a vertical 

 and two postverticals on each side ; besides the strong ocellar 

 bristles there are several smaller ones behind ocelli ; on ante- 

 rior part of front there are two submedian rows of bristle's, 

 each containing three, the lowest one of which is strong ; 

 among the fronto-orbitals are a few bristly hairs ; third anten- 

 nal joint reddish yellow, arista pubescent. Face yellowish, 

 concave in profile, carina prominent, vibrissas strong. Cheeks 

 yellowish, with yellow pollen ; half as high as eye and bearing 

 three strong and several weak bristles. Mouth-parts yellow, 

 proboscis fleshy, palpi subclavate, bearing several bristles. 

 Occiput black, yellowish on lower part. Thorax dark brown 

 opaque ; mesonotura with lateral margins, except just behind 

 the humeri, yellowish, and four longitudinal brownish-yellow 

 pollinose vittee ; one humeral, two posthuraeral, two presutural, 

 two supraalar, one postalar, a small prescutellar, and five 

 dorsocentrals on each side ; scutellum subshining black cen- 

 trally, margins broadly yellow ; three strong, three weak, and 

 three bristly hairs on each side ; pleura? dark brown, yellowish 

 along various sutures, with two sternopleural bristles ; halteres 

 yellow. Abdomen subopaque black, with rather strong bristly 

 hairs on lateral margins. Legs brownish black, coxiie, knees, 

 tibitv and tarsi yellowish ; front femora with three bristles on 

 under side near tip, middle with a strong bristle near base, 

 middle tibiiie with from eight to ten very strong bristles or 

 spines on outer side, each joint of middle tarsi with one or two 

 spinous bristles on apex; hind tibitie with five bristles along 

 posterior margin. Wings with a fuscous tinge ; first section of 

 costa with six short bristles, second section twice as long as the 

 third ; small cross-vein nearly opposite the midpoint of the 

 second section of the costa. Length, 3 mm. 



Six specimens ; April and May. 



