THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 197 



Type. — In Museum of Comparative Zoology, Cambridge, Massa- 

 chusetts. 



A note on the mating habits of this species is given in the intro- 

 duction. 



No. 139. DOLICHOPUS SUBCILIATUS Loew. 



Dolichopus suhciliatus Loew, Mon. N. Amer. Dipt., pt. 2, p. 42. 

 The following description is a copy of Doctor Loew's: 



Metallic-green, bright. Front metallic-green. Antennae black; on under side of 

 the first joint I am not able to discover any lighter coloring; third joint rather blunt 

 at the tip. Face grayish-yellow, palpi yellow. Cilia of the inferior orbit pale-yellow- 

 ish. Hypopygium black; lamellae of medium size, ovate, white, with narrow black 

 border, on the apical margin somewhat jagged and fringed with black bristles. The 

 four posterior coxae blackish with yellow tip. Fore coxae yellow, only at the extreme 

 basis somewhat blackened, upon the anterior side beset with very delicate black 

 hairs, which do not reach to their base. Feet pale yellow. Hind femora with a bristle 

 before the tip, upon the greater part of the under side sparsely ciliated with moder- 

 ately long yellowish hairs. Hind tibiae stout, but not exactly thickened, not hairy 

 upon the first half of the hind side [basal half of inner surface]; brownish at extreme 

 end. Fore tarsi twice as long as the tibiae; their four first joints very slender, yellow; 

 the first joint nearly as long as the three following ones together; the third somewhat 

 shorter than the second; the fourth hardly half as long as the third, the fifth joint 

 black, flattened, broad, still not as large as in J>. batillifer; upon its upper edge it is 

 beset with appressed minute black hairs. Middle tarsi from the tip of the first joint 

 blackened. Hind tarsi entirely black. Cilia of the tegulae [calypters] yellowish-white. 

 Wings hyaline, somewhat grayish, at the tip of the first longitudinal vein with a long but 

 not very stout swelling, which gradually merges into the costa; fourth longitudinal 

 vein not broken. 



Length 0.21-0.22, wing 0.25 inch. Fort Resolution, Hudson's Bay Territory. 



The species has not been recognized since it was described. It 

 is probably an Arctic species and as that region has not been visited 

 much by collectors it has never been found. The type at the Museum 

 of Comparative Zoology has been completely destroyed by museum 

 pests. 



No. 140. DOLICHOPUS AMPLIPENNIS, new species. 



Male. — Length 5.5-6 mm.; of wing 6-6.5 mm. Face rather wide, 

 yellowish gray, almost ocher yellow, a little paler on the lower por- 

 tion. Front shining blue-green. Antennae wholly black or very 

 slightly tinged with yellow on lower edge of first joint; third joint 

 somewhat oval, a little longer than wide, obtusely pointed at tip. 

 Lower orbital cilia yellow, the black cilia descending below the middle 

 of the eye. 



Thorax green with bronze brown reflections which form wide 

 vittae on the dorsum, which is covered with brown pollen leav- 

 ing the bronze vittae miore shining; the pollen along the front edge 

 is more gray. Abdomen green with coppery reflections; the white 

 pollen on its sides abundant and extending upon the dorsum. Hy- 

 popygium black; its lamellae (fig. 1406) large, elongate oval, twice as 

 long as wide, yellowish, with wide black border on apical margin. 



