1046 LIST OF DIPTERA. 



part larger than those elsewhere : sucker and palpi yellow : feelers 

 pitchy, clothed with short black hairs ; bristle black, bare, a little 

 longer than the third joint: abdomen nearly cylindrical, slightly 

 compressed, a little deeper towards the tip, rather longer than the 

 chest : legs tawny ; fore feet, and tips of the fore thighs, of the fore 

 shanks and of the four hinder feet pitchy ; claws black : wings co- 

 lourless, narrow ; wing-ribs tawny ; veins pitchy, tawny at the base ; 

 lower cross-vein straight, perpendicular, distant by less than its 

 length from the hind border, by more than twice its length from the 

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

 tip of the wing ; poisers tawny, with yellow knobs. Length of the 

 body ]£ line ; of the wings 2\ lines. 



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

 G. Barnston, Esq. 



Lissa, Meigen. 



Lissa dolium. Ocyptera dolium, Fabr. Syst. And. 315. Chyliza 

 loxocerina, Fall. Opomyz. 6, 1. Lissa loxocerina, Meig. Dipt. 

 v. 370, pi 52, /. 1—4. Macq. Hist. Nat. Dipt. ii. 377, 1. 



a. England. 



Lissa varipes, n. s., mas. Nigra, nitens, capite caneseente facie alba, 

 abdominis apice compresso, palpis antennisque fulvis, pedibus 

 nigris ferrugineo piceo fulvoque variis. 



Body long, narrow, black, shining : head beset with a few black 

 bristles, covered above and in front with hoary bloom ; face white, 

 with a single bristle on each side at the base ; epistoma not promi- 

 nent : eyes dark red, convex ; facets of the fore part larger than 

 those elsewhere : sucker pitchy, clothed with tawny hairs ; palpi 

 tawny, beset with black bristles : feelers tawny, as long as the face ; 

 third joint linear, rounded at the tip, paler and a little longer than 

 the second ; bristle black, slender, feathered with long hairs, longer 

 than the third joint: abdomen nearly cylindrical, slightly deepening 

 towards the tip, where it is compressed, narrower and very much 

 longer than the chest, thinly clothed with very short hoary hairs : 

 fore thighs tawny, beset beneath with a few long black bristles ; fore 

 shanks ferruginous, tawny at the base, armed with a few long black 

 bristles ; fore feet pitchy, ferruginous at the base ; foot-cushions 

 tawny ; claws black ; middle thighs black, tawny at the base ; mid- 

 dle shanks and feet pitchy, first joint of the latter dark tawny ; hind 

 thighs black, pale tawny at the base ; four hinder knees ferruginous ; 

 four hinder shanks beset with a few short black bristles ; hind 



