262 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



])romineut, although narrow. One middle tibia has one, the other 

 two bristles below. 



Described from 1 male taken at Waubamic, Ontario, June 14, by 

 H. S. Parish. 



Type. — In the collection of A. L. Melander. 



This species resemble porphyrops in the lorm of its antennae, from 

 whicli it is separated by the form of the wings, as well as the color of 

 the hind legs and feet. Although the fore tarsi are broken off, leaving 

 only the first two joints, it seems almost certain that they were 

 enlarged at tip, as the second joint is already very slightly com- 

 ])ressed; still the species is well marked by the long, narrow wings 

 with the slight lobe at tip of fifth vein; the long third antennal joint 

 (which by its shape suggested the name), and the yellow hind basi- 

 tarsi; the latter, however, may sometimes be black almost to their 

 !)ase, as it often is in species where the black shades into the yellow of 

 their base and is not sharply separated. 



No. 192. DOLICHOPUS SCOPARIUS Loew. 



Dolichopus scoparius Loew, Mon. N. Amer. Dipt., pt. 2, 1864, p. 70. — Wheeler, 

 Psyche, vol. 5, 1890, p. 339.— Aldrich, Kansas Univ. Quart., vol. 2, 1893, 

 p. 18, pi. 1, fig. 9.— Melander and Brues, Biol. Bull., vol. 1, 1900, p. 148.— 

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



Male. — Length 5-6 mm.; of wing 5-5.3 mm. Face rather wide, 

 silvery white, front shining green with reddish purple or blue reflec- 

 tions. Antennae black; first joint yellow below, sometimes only 

 the upper edge black; third joint about as long as wide, rather 

 rounded at tip. Lateral and inferior orbital cilia pale yellow, about 

 eight of the upper cilia on each side black. 



Thorax green with well-defined median and poorly defined lateral 

 vittae of a reddish purple color on the dorsum, which is dulled with 

 gray pollen, almost invisible except along the front, pleurae with 

 grayish pollen. Abdomen green with coppery reflections ; the white 

 pollen on its sides abundant. Hypopygium black, more or less 

 yellow at tip and on the sides, its lamellae rather large, smooth, and 

 unusually thick; on their inner surface near the middle is a small 

 space covered with little black hairs which reach the upper edge 

 (these are mentioned by Wheeler as a fringe of "delicate black 

 hairs") ; these are difficult to see unless the lamellae are extended. 



Fore coxae yellow with a large black spot at base on outer surface. 

 These spots sometimes extend as a line more than half their length, 

 their anterior surface covered with stiff black hairs. Middle and 

 hind coxae black with yellow tips. Femora and tibiae yellow. 

 Middle and hind femora each with one preapical bristle, the latter 

 nearly bare below, all tibiae with numerous strong bristles; middle 

 pair with five bristles below, their basitarsi with one large bristle 

 above and another on the front side near it. Posterior tibiae onlv a 



