LIST OF DIPTERA. 977 



Cordylura tenuior, Jlarnstons MSS. Cinerea, capite pectoreque 

 canis, palpis pedibusque falvis, anlennis iarsisque nigris, alls 



Body black, adorned w'th a gray covering 1 , clothed with black 

 hairs and bristles ; head hoary in front and beneath ; sides of the 

 face without bristles : eyes bright red ; facets of the front a little 

 larger thau those elsewhere : sucker black, clothed with tawny 

 hairs ; palpi tawny, beset with black bristles : feelers black, nearly 

 as long as the face ; third joint linear, rather slender, tawny at the 

 base, rounded at the tip, more than twice the length of the second 

 joint; bristle clothed with short hairs, nearly thrke the length of 

 the third joint : breast hoary : abdomen wanting : legs tawny, 

 clothed with black hairs and bristles ; feet black, tawny at the base ; 

 fool-cushions tawny : wings colourless ; wing-ribs and veins tawny ; 

 lower cross-vein perpendicular, nearly straight, more than twice its 

 length distant from the middle cross-vein, and about four times its 

 length from the tip of the wing ; scales very small, colourless, with 

 pale yellow borders ; poisers yellow. Length of the body 1^- line ; 

 of the wings lines. 

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



G. Barnstou, Esq. 



Cordylura volucricaput, Barnstons MSS., mas. et fern. Cinerea, 

 capiie ferrugineo macuiain^ abdmnine nigm apice fulvo, palpis 

 Jlavls, anlennis nigris basi ferrugineis, pedibus fulvis, alis lim- 

 pidis. 



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

 bristles : a large ferruginous spot adjoining the base of the feelers ; 

 peristoma white, towoy on each side ; sides of the face without bris- 

 tles ; epistoma not prominent : eyes red, convex ; facets on the fore 

 part larger than those elsewhere : sucke** black, clothed with tawny 

 hairs ; palpi pale yellow, spindle-shaped, clothed with white hairs : 

 feelers deep black, much shorter thau the face ; first and second 

 joints ferruginous ; third joint conical, much longer than the se- 

 cond ; bristle bare, slender, rather stout at the base, a little more 

 thau twice the length of the third joint : abdomen quite black, li- 

 near, tawny and shining at the tip, clothed with hoary hairs and 

 bristles; longer but hardly narrower thau the chest: legs tawny, 

 clothed with hoary hairs and with a few black bristles ; claws black; 

 fore thighs rather thick : wings colourless ; wing-ribs tawny ; veins 

 black, tawny at the base ; lower cross-vein straight ; scales very 

 smal^ colourless, their borders pale yellow, fringed with white hairs; 

 poisers tawny. Female. — Head pale yellow on each side of the 



PART IV 4 Q 



