THE DIPTEEOUS GENUS DOLICHOPUS loST NORTH AMERICA. 195 



vein; anal angle very prominent, and ^^dth a deep sinus between the 

 tips of fifth and sixth veins, which forms something of a lobe at the 

 anal angle. 



Female. — K female in the United States National Museum which is 

 in very poor condition is, no doubt, the female of this species; it is 

 a very bright sliining green with most of the thorax and front violet. 

 Face not very wide for a female, but rather long, silvery white. 

 Antennae yellow, scarcely darker at tip, third joint pointed at tip, 

 longer than wide. Proboscis and palpi yellow. Middle tarsi plain, 

 a little longer than their tibiae, black from the tip of the first joint, 

 which has a large bristle above near apical third. Middle tibiae with 

 three bristles below, two near apical third, and one near basal third. 

 Hind tibiae wholly pale yellow; hind tarsi wholly black. Wings 

 (fig. 137a) with the anal angle very prominent for a female, and 

 without any trace of a lobe at tip of sixth vein and without any 

 indication of the sinus found in the male. 



Redescribed from 1 male in the United States National Museum, 

 taken by Mrs. Slosson on Mount Washington, New Hampshire, and 

 1 female taken by Morrison, in the White Mountains, New Hamp- 

 shire. 



Type locality, — Woods Hole, Massachusetts. I have seen several 

 males from New England in the collection of C. W. Johnson. 



Type.—ln American Museum of Natural History, New York City. 



No. 138. DOLICHOPUS LONGIMANUS Loew. 



Dolichopus longimanus Loew, Neue Beitr., vol. 8, 1861, p. 14; Mon. N. Amer. 

 Dipt., pt. 2, 1864, p. 38.— Aldrich, Kansas Univ. Quart., vol. 2, 1893, p. 10.— 

 CoQUTLLETT, Proc. Wash. Acad. Sci., vol. 2, 1900, p. 425. — Melander and 

 Brues, Biol. Bull., vol. 1, 1900, p. 148. 



Male. — Length 6-7.2 mm.; of wing 5-6.5 mm. Face moderately 

 wide, pale yellowish to dark ocher yellow. Front dark green, slightly 

 dulled with gray pollen. Antennae black, first joint usually a little 

 yellowish at lower apical corner; third joint a little longer than wide, 

 pointed at tip; inferior orbital cilia yellowish, the black cilia of the 

 upper orbit descending to the middle of the eye. 



Thorax green with a median, more or less bronze colored, stripe on 

 the dorsum, wlfich is covered with thin grayish pollen ; pleurae dulled 

 with grayish pollen. Abdomen green with bronze or reddish coppery 

 reflections which are sometines wholly wanting; the wlfite pollen 

 on its sides abundant and extending upon the dorsum. Hypopygium 

 black, its lamellae (fig. 138&) of moderate size, somewhat oval in 

 outline, whitish with a broad black border on apical margin and on 

 upper edge, jagged and bristly at lower apical corner, fringed on 

 upper edge with black hairs. 



Fore coxae yellow, blackened at base, on outer side the black 

 reaches beyond the middle, clothed with black hairs on anterior 



