LIST OF DIPTERA. 87 



two gray stripes: sides of hind chest yellow: abdomen gray, some- 

 what paler on the hind border of each segment, and having a yellow 

 stripe on each side: legs dull tawny, long and slender; feet brown: 

 wings colourless ; veins brown ; poisers yellow, with brown tips. 

 Length of the body 2 lines ; of the wings 5| lines. 



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

 G. Barnston, Esq. 



Leptomorphus, Curtis. 



Leptomorphus Walkeri, Curt. Brit. Ent. 365. 

 a. England. From Mr. Walker's collection. 



Leptomorphus elongatus, Curtis. Cinereo-fuscus, antennis fuscis, 

 pedibus fulvis, tibiis apice tarsisquefuscis, alis limpidis. 



Body grayish brown: eyes black: feelers brown, yellow at the 

 base, longer than the chest: palpi yellow, long: legs tawny: tro- 

 chanters, feet and tips of the shanks brown ; shanks not bristly, their 

 spines short : wings colourless ; veins brown ; poisers tawny. Length 

 of the body 3 lines ; of the wings 5 lines. 



The airangement of the veins of this species is somewhat dif- 

 ferent from that of L. Walkeri : the first vein is simple ; the second 

 is forked before half its length ; the third is forked nearer the tip, 

 the base of its branch is obsolete, and it appears isolated in the disk 

 of the wing ; the fourth is simple, but a cross vein joins it to the 

 third and forms an outward angle, whence a vein proceeds to the 

 disk of the wing ; the fifth vein is slight, and joins the fore border 

 at one-third of the length of the wing. 



Diomonus, n. g. 



Resembles Platyura as regards its antennae, while its wings are 

 those of Leptomorphus, except that the areola under the anterior 

 margin of the wing, absent in that genus, is present in this. 



Diomonus nebulosus, Barnstorms MSS. Purpureo-niger, antennis 

 flavis basi nigris, pedibus nigris, femoribus basi flavis, tarsis 

 rufo-fuscis, alis subfulvis fusco unimaculatis apice cinereis. 



Body purplish black, shining : palpi tawny : feelers bright yel- 

 low, black towards the base, a little longer than the chest, having 

 fifteen or sixteen joints ; first and second joints dark red : mouth 

 dark red : legs black ; tips of the hips and thighs at the base pale 

 yellow ; hind thighs armed beneath, near their tips, with long stout 



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