LIST OF DIPTERA. 975 



ginous spot on the crown adjoining the base of the feelers ; sides of 

 the face and of the peristoma pale ferruginous, the former without 

 bristles ; epistoma not prominent : eyes red, partly black, convex ; 

 all the facets very small : sucker black, tawny at the base, clothed 

 at the tip with tawny hairs ; palpi pitchy, tawny at the base, 

 clothed with black bristles ; feelers black, a little shorter than the 

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

 twice the length of the second ; bristle feathered with hairs of mo- 

 derate length, much more than twice the length of the third joint : 

 abdomen linear, narrower and very much longer than the chest ; 

 appendages tawny : legs tawny, clothed with black hairs and bris- 

 tles ; fore thighs gray ; feet pitchy ; foot-cushions tawny : wings 

 colourless ; wing-ribs and veins pale tawny, the latter darker to- 

 wards the tips ; lower cross-veins straight ; scales rudimentary ; 

 poisers yellow. Length of the body 2 lines ; of the wings 4 lines. 

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

 G. Barnston, Esq. 



Cordylura flavipennis, Barnstons MSS., fern. Cinerea, palpis 



antennis pedibusque nigris, alis subfulvis. 



Body black, with a gray covering, clothed with black hairs 

 and bristles: sides of the face without bristles: epistoma prominent: 

 eyes red ; fore part convex ; all the facets very small : sucker black, 

 long, slender, clothed with tawny hairs ; palpi black, subclavate, beset 

 with black bristles : feelers black, a little shorter than the face ; third 

 joint downy, very slightly increasing in depth to the tip, which is almost 

 truncated, nearly thrice the length of the second joint; bristle downy, 

 about twice the length of the third joint : abdomen spindle-shaped, 

 longer but not broader than the chest : legs black, clothed with black 

 hairs and bristles; foot-cushions pitchy : wings slightly tawny; wing- 

 ribs and veins tawny ; veins pitchy towards the tips ; lower cross- 

 vein straight ; scales dingy white, with pale yellow borders ; poisers 

 pale tawny. Length of the body 3 lines ; of the wings 5 lines. 

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



G. Barnston, Esq. 



Cordyltjra imperator, Barnstoris MSS., fern. Cinerea, palpis an- 

 tennisque nigris, pedibus fulvis, alis subcinereis ad costam sub- 



Body black, with a gray covering, clothed with black hairs and 

 bristles : sides of the face without bristles ; epistoma hardly promi- 

 nent : eyes red ; fore part slightly convex ; the facets small : 

 sucker black, clothed with tawny hairs ; palpi black, beset with 



