THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 139 



the first joint, tiind tarsi wholly black. Calypters, their cilia, and the 

 halteres yellow. 



Wings (fig, 91) a little grayish; costa not thickened at tip of first 

 rein; last section of fourth vein a little bent before its middle; hind 

 margin of wing scarcely indented at tip of fifth vein; anal angle nearly 

 obsolete, the wings being narrowed toward their base, still the anal 

 angle is a little prominent. 



Female. — Face T\dde; third antennal joint about as long as broad; 

 fore coxae with minute black hairs on the front surface; fore tarsi 

 one-fourth longer than their tibiae ; hind femora ^^^Lthout the rows of 

 black hairs below; wings bro\vnish along the front ^vith the anal angle 

 more developed. 



Redescribed from one pair from New Hampshire and several males 

 from Ithaca, New York. 



Type locality. — District of Columbia. 



Ty^e.— Museum of Comparative Zoology, Cambridge, Massachu- 

 setts. 



No. 92. DOUCHOPUS INDIGENA, new species. 



Male. — Length 4.5 mm. ; of wing 4 mm. Face rather wide, a little 

 narrowed below, silvery white. Front shining green. Antennae 

 black; first joint yellow on lower half or less; third joint a little longer 

 than wide (in one specimen it is not any longer), scarcely pointed at 

 tip, which is somewhat rounded. Lateral and inferior orbital cilia 

 pale, a few of the upper cilia black. 



Thorax green; dorsum shining, with coppery reflections at the 

 suture; pleurae dulled with white pollen. Abdomen green with 

 coppery reflections; the white pollen on its sides abmidant and 

 extending upon the dorsum. Hypopygium black; its lamellae mod- 

 erately large, somewhat oval in outline, jagged and bristly at apex, 

 fringed with yellow or brownish hairs on upper edge, white with very 

 narrow black border on apical and upper edges. 



Fore coxae wholly or almost wholly yellow, with very minute yel- 

 low hairs on the anterior surface; middle coxae black with yellowish 

 tips ; hind coxae yellow, with a large black spot on outer surface and 

 a small one on posterior side. Femora and tibiae yellow. Middle 

 and hind femora each with one preapical bristle, the hind with a row 

 of minute delicate yellow hairs on lower inner edge. Posterior 

 tibiae black at tip for one-sixt|^ their length. Fore tarsi (fig. 92a) 

 slightly longer than their tibiae, black from the tip of the first joint; 

 first joint a little longer than the second and third taken together, 

 which are of equal length, fourth and fifth joints also of equal length, 

 and each a very little shorter than the third; last four joints each dis- 

 tinctly narrowed at base. Middle tarsi one and a fourth times as 

 long as their tibiae, black from the tip of the first joint, which is a 

 little shorter than the three following joints taken together and 



