206 BULLETIX 116, UNITED STATES NATIONAL IVtUSEUM. 



No. 147. DOLICHOPUS COMPACTUS, new species. 



Male. — Length 5.5 mm.; of wing the same. P\ice wide, only a 

 little narrowed below, grayish white. Front green with bronze 

 reflections. Antennae black; first joint yellow with a. narrow black 

 upper edge; third joint somew^hat conical, about as long as wide, 

 pointed at tip. Lateral and inferior orbital cilia yellowdsh white, 

 about eight of the upper cilia on each side black. 



Thorax green with coppery reflections; dorsum dulled with gray 

 pollen; pleurae with whitish pollen. Abdomen green with coppery 

 reflections and narrow black incisures; the white pollen on its sides 

 abundant and extending upon the dorsum. Hypopygium black; its 

 lamellae large, nearly twice as long as wide, white with a broad black 

 border on apical margin and. extending upon the upper edge, jagged 

 and bristly on lower half of apical margin, fringed above mth black 

 hairs, below with a few yellow hairs. 



Fore coxae yellow with a blackish spot at base on outer side, their 

 anterior surface covered with conspicuous black hairs, only a few 

 pale ones on upper outer corner. Middle and hind coxae black with 

 yellow tips. Femora and tibiae yellow. Middle and hind femora 

 each with one preapical bristle, the latter wdthout cilia, but with 

 two or three rows of minute yellow hairs on the low^er portion of their 

 inner surface. Posterior tibiae a little blackish at extreme tip, only 

 a little thicker than the others, the inner row of large bristles on upper 

 surface with six, the outer with eight bristles, the usual glabrous 

 stripe between the rows broken by little hairs; middle tibiae with 

 one large bristle below^ near apical third and another near it on the 

 lower part of the front surface. Fore tarsi (fig. 147a) one and 

 three-fourths times as long as their tibiae, black from the tip of the 

 first joint; first two joints taken together as long as the tibia, second 

 three-fourths as long as first, third three-fourths as long as second, 

 fourth half as long as third; first three joints slender, tip of third only 

 slightly widened, last two compressed, fourth a little widened, fifth 

 a little more so, widest near the tip, where it is scarcely half as wide 

 as long; it is as long as the third; pulvilli white, rather conspicuous. 

 Middle tarsi nearly one and a half times as long as their tibiae, black 

 from the tip of the first joint, which has a large bristle above near 

 apical third. Hind tarsi wholly black, a little longer than their 

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



Wings (fig. 147) grayish, a little tinged with broAvn m front of third 

 vein; costa not enlarged at tip of first vein; last section of fourth 

 vein rather sharply, but not greatly, bent before its middle; third 

 vein bent backward a little near the tip ; hind margin of wing scarcely 

 indented at tip of fifth vein; anal angle prominent and extending a 

 little toward the root of the wing; wing of somewhat equal width. 



