148 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



glabrous stripe between the large bristles although rather wide is 

 somewhat broken by little black hairs, on basal half of inner surface 

 the little black hairs become so small as to give it the appearance 

 of being glabrous; bristles on upper surface large. Fore tarsi a 

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

 which is about as long as the three following joints taken together, 

 second joint only a little longer than third, this and fifth of about 

 equal length, fourth a little shorter. Middle tarsi one and a fourth 

 times as long as their tibiae, black from the tip of the first joint, 

 which is without a bristle above. Hind tarsi wholly black. Calyp- 

 ters and halteres yellow, the former with black cilia. 



Wings (fig. 100) grayish; costa scarcely enlarged at tip of first 

 vein; last section of fourth vein bent at right angles at its middle, 

 upper bend rounded, lower bend with more or less of a stump of a 

 vein (which suggested the name) ; hind margin of wing scarcely 

 indented at tip of fifth vein, rather evenly rounded, the anal angle 

 being rather prominent. 



Female. — ^Like the male, except that the face is a little wider, 

 third antennal joint about half as large, and the middle femora 

 usually have but one bristle before the tip. 



Redescribed from numerous males and females from the following 

 localities: Brookings, South Dakota; Michigan; Montana; Idaho, 

 several places, July-August; Lafayette and Shelby, Indiana, May 24- 

 July 26 (Aldrich) ; Iowa (Osborn) ; Greeley, Colorado, August 31 ; Lance 

 Creek, Sheridan and Natrona County, Wyoming, August 14-31 

 (Wheeler); Wells, Nevada, June 6; Lawrence and Baldwin, Kansas, 

 May; western New York, May 21-September 19; southern Ontario, 

 rfom Toronto to Chatham, May 30-July 3 ; Colorado Springs, Colorado, 

 June 10; Illinois; Sandusky, Ohio, June 30; Los Angeles, California, 

 May 3 ; Washington, several places, July to August. I have found it 

 abundant in greenhouses around Buffalo, New York, in February 

 and March. 



Type localities. — ^Nebraska; Lake Winnipeg; New Rochelle, New 

 York. Aldrich reports it from Michigan, Montana, Kansas, and 

 Idaho. Chagnon from Montreal, Quebec. Melander and Brues from 

 Illinois, Texas, and Wyoming. Johnson, Insects of New Jersey, from 

 Monmouth County, and Avalon, New Jersey, August 22-31. 



No. 101. DOLICHOPUS INCISURALIS Loew. 



DolichopiLs incisuralis Loew, Neue Beitr., vol. 8, 1861, p. 25; Mon. N. Amer. 

 Dipt., pt. 2, 1864, p. 74; Centuries, vol. 7, 1866, No. 80 (platyprosopvs).— 

 Johnson, Insects of New Jersey, 1909, p. 756. 



Male. — Length 3-4.5 mm. ; of wing 3.5-4 mm. Face rather narrow, 

 silvery white. Front shining green. Antemiae black; first joint 

 reddish below; third rather small, about as long as broad, somewhat 



