THE DIPTEROUS GENUS DOLICHOPUS IN FORTH AMERICA. 263 



little thickened; the usual glabrous stripe on upper surface broad 

 and reaching the tip. Fore tarsi (fig. 192a) about^one and a third 

 times as long as their tibiae, black from the extreme tip of the third 

 joint; first joint about equal to the three following joints taken 

 together, second half as long as first, third two-thirds as long as second 

 and but little longer than fourth, a very little widened at tip, fourth 

 and fifth a very little flattened, fringed on each side so as to form 

 when taken together a somewhat elliptical tip to the tarsi; they are 

 wholly black and the fourth joint is slightly the longest. Middle 

 tarsi one and a third times as long as their tibiae, black from the tip 

 of the first joint. Hind tarsi black from the extreme tip of the first 

 joint. Calypters and halteres yellow, the former with black cilia. 



Wings (fig. 192) grayish, usually tinged with brown in front of 

 third vein and narrowly along the posterior veins; costa without 

 enlargement at tip of first vein; last section of fourth vein a little 

 bent before its middle; hind margin of wing indented at tip of fifth 

 vein; anal angle prominent. 



Female. — Face wide, less silvery than in the male; fore tarsi plain, 

 about one and a fourth times as long as their tibiae, black or infus- 

 cated from the tip of the first joint; hind margin of wing distinctly 

 but not very much indented at tip of fifth vein. The orbital cilia of 

 both male and female have one or two black bristles next to the 

 proboscis. 



Redescribed from 28 males and several females, taken as follows: 

 Franconia, New Hampshire; Bretton Woods, New Hampshire, 

 June 30; Dover, New Jersey; Erie County, New York, June 2-July 

 18; Bond Lake, Ontario, July 16; Port Credit, Ontario, July 15; 

 Kearney, Ontario, July 2-7. 



Type localities. — Maine and Massachusetts. Aldrich reports it 

 from Pennsylvania and Montreal, Quebec; Melander and Brues from 

 Illionois and Wisconsin; Johnson from Dover, New Jersey, June 23. 



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

 setts. 



No. 193. DOLICHOPUS QUADRILAMELLATUS Loew. 



Dolichopus quadrilamellatus Loew, Cent., vol. 5, 1862, No. 83; Mon. N. Amer. 

 Dipt., pt. 2, 1864, p. 331.— Johnson, Insects of New Jersey, 1909, p. 756. 



J/aZe.— Length, 6 mm.; of wing, 5.7 mm. Face wide, scarcely 

 narrowed below, silvery white, very slightly tinged with yellow above. 

 Front shining green or blue-green. Antennae black; first joint black 

 above, yellow below, sometimes mostly black and at others almost 

 wholly yellow; third joint scarcely longer than wide, rounded at tip. 

 Lateral and inferior orbital cilia yellowish with a large black bristle 

 at their lower end next to the proboscis, about seven of the upper 

 cilia on each side black. 



