LIST OF DIPTERA. 1047 



shanks black, pitchy towards the base ; hind feet ferruginous : 

 wings slightly gray, clouded with brown at the tips and about the 

 cross-veins ; wing-ribs and veins tawny, the latter pitchy at the tips 

 and in the darker parts of the wings ; lower cross-vein straight, per- 

 pendicular, distant by more than half its length from the hind bor- 

 der, by more than its length from the middle cross-vein, and by 

 more than four times its length from the tip of the wing ; longitu- 

 dinal veins straight ; poisers tawny. Length of the body 3^ lines ; 

 of the wings 5 lines. 

 a. Ohio. Presented by the Entomological Club. 



Lissa cornuta, Barnston's MSS., mas. Nigra, capite albo micante 

 antice fulvo, palpis antennisque nigris, his basi pedibusque fuL- 

 vis,femoribus nigris, alls subcinereis. 



Body black, shining, clothed with black hairs and bristles : 

 head adorned with white reflections, tawny and prominent in front ; 

 sides of the face without bristles ; epistoma not prominent : sucker 

 black, clothed with tawny hairs : palpi black, beset with black bris- 

 tles : feelers black, much shorter than the face ; first and second 

 joints tawny; third joint not longer than the second; bristle downy, 

 thrice the length of the third joint : abdomen cylindrical, very 

 slightly increasing in breadth towards the tip, narrower than the 

 chest and almost twice its length : legs tawny, clothed with black 

 hairs and bristles ; thighs black, with tawny tips : wings slightly 

 gray ; wing-ribs tawny ; veins pitchy, tawny towards the base ; 

 lower cross-vein straight ; scales very small, whitish, with pale yel- 

 low borders ; poisers pale tawny. Length of the body 2\ lines ; of 

 the wings 3| lines. 



a. St. Martin's Falls, Albany Eiver, Hudson's Bay. Presented by 

 G. Barnston, Esq. 



Lissa carbonaria, n. s., fern. Atra, nitens, facie fulva, abdomine ci- 

 nerascente, palpis, antennis pedibusque nigris, tibiis ferrugineis 

 apice piceis, tarsis piceis, alis subcinereis, basi nervorumque mar- 

 ginibus fulvis. 



Body black, shining : head and chest beset with black bristles: 

 face tawny, its sides without bristles ; epistoma not prominent : 

 eyes pitchy ; facets of the fore part a little larger than those else- 

 where : sucker black, pitchy and clothed with tawny hairs towards 

 the tip ; palpi black, beset with black bristles : feelers black, a little 

 shorter than the face ; third joint nearly linear, rounded at the tip, 

 longer than the second joint ; bristle hairy : abdomen spindle- 

 shaped, covered with gray bloom, thinly clothed with black hairs, 



