404 ENTOMOLOGICAL NEWS. [Nov., '14 



New Species of North American Dolichopodidae 



(Diptera). 



By M. C. VAN DUZEE, Buffalo, New York. 



Systenus americanus n. sp. 



Male : Length 3.2 mm. Face covered with white pollen ; proboscis 

 and palpi black; front metallic bluish-green, more blue in the center, 

 rather long on account of the antennas being inserted so low down on 

 the head; antennae black, the third joint more brown, first and second 

 joints short, third joint long and flattened, about the length of the 

 front; arista terminal, stout, fully one-half as long as the third joint; 

 cilia of the upper orbit black, of the lateral and inferior orbit white. 



Dorsum of the thorax and the scutellum dark metallic blue-green, 

 bright but somewhat dulled with almost invisible brown pollen ; 

 pleurae darker-colored than the dorsum and with gray pollen. 



Abdomen metallic green, more bronze black on the dorsum towards 

 the apex ; hypopygium large, black, the peduncle about as long as the 

 diameter of the hypopygium, and forming a sort of slender seventh 

 segment to the abdomen, being concolorous with it ; hypopygium with 

 a small black appendage ciliate with brown hairs on the outer surface 

 near the tip ; outer lamellae yellow, somewhat sickle-shaped with a 

 crooked spine at the base of the bend. 



Coxae and legs black ; fore and middle coxae with white hairs on 

 the front surface, those on the fore pair long and abundant ; hind 

 coxse with a white bristle and several long white hairs on the outer 

 surface ; femora with a greenish reflection ; the fore pair with a 

 fringe of long white hairs on the lower outer edge ; trochanters and 

 knees yellowish; bristles of the tibiae small; hind metatarsi two- 

 thirds as long as the second joint. Tegulae, their cilia and the halteres 

 yellow. 



Wings tinged with blackish ; fourth vein bent forward near the 

 middle of the last section, but parallel with the third vein toward the 

 tip, and ending in the apex of the wing. 



Described from one male from the Black Mountains, North 

 Carolina, May (collection of Mr. Nathan Banks). 



Gymnopternus flaviciliatus n. sp. 



Male : Length 3 mm. Face covered with silvery-white pollen ; front 

 blackish with white pollen, which appears brown when viewed from 

 above; antennae of moderate size, yellow, third joint slightly darkened 

 at apex, somewhat rounded at the tip. 



Dorsum of the thorax dark blue-green almost black, thickly covered 

 with brown pollen ; scutellum bronze-brown with a central longitu- 

 dinal ridge. 



