114 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



No. 70. DOLICHOPUS APHELES Melander and Brues. 



Dolichopus apheles Melander and Brues, Biol. Bull., vol. 1, 1900, p. 144, fig. 3. 



Male. — Length 4-5 mm.; of wing 4 mm. Face wide, yellowish 

 gray or ahnost whitish. Front blue green, a httle dulled with gray 

 pollen. Antennae black; lower edge of first joint more or less red- 

 dish; third joint about as long as wide, subtriangular, a little pointed 

 at tip. Palpi dark yeUow. Lateral and inferior orbital cdia yel- 

 lowish, about six of the upper cilia on each side black. 



Thorax green, more shining and bluish posteriorly, the anterior 

 half of the dorsum dulled with brownish poUen; pleurae dulled with 

 white poUen. Abdomen green with black incisures, hind margins 

 of segments coppery; the white pollen of its sides abundant and ex- 

 tending over the dorsum. Hypopygium black; its lamellae (fig. 

 70a) rather small, only a little longer than wide, oval but narrow- 

 ing into the stem, whitish with a narrow black border on apical and 

 upper margins, jagged and bristled at apex, fringed above with deli- 

 cate, rather long, dark hairs. 



Fore coxae yellow, with a round black spot at base on outer sur- 

 face, front side with white pollen and conspicuous black hairs. Mid- 

 dle and hind coxae black with yellow tips. Femora yellow; middle 

 and hind femora each with one preapical bristle, the latter black at 

 tip on upper edge as far as the preapical bristle, without cilia below. 

 Tibiae yellow; posterior pair scarcely thicker than the others, black 

 at tip for one-fifth their length. Middle tibiae with one bristle 

 below, their basitarsi without a bristle above. Fore and middle 

 tarsi a little longer than their tibiae, black from the tip, sometimes 

 from the middle of the first joint, the front ones with the first joint 

 as long as the three following joints taken together, fourth and fifth 

 of equal length, third a little longer than fourth. Hind tarsi wholly 

 black, scarcely one and a fourth times as long as their tibiae. Calyp- 

 ters and halteres yellow, the former with black cilia. 



Wings (fig. 70) grayish, tinged with brown in front of third vein; 

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

 little bent beyond its basal third, but before its middle; hind margin 

 of wing not indented at tip of fifth vein; anal angle rounded, not 

 very prominent. 



Redescribed from the type specimen in the American Museum 

 of Natural History in New York City, which was taken at Milwaukee, 

 Wisconsin; and 1 male taken at Battk Creek, Michigan, by J. M. 

 Aldrich. 



No. 71. DOLICHOPUS AFFLUENS, new species. 



Male. — Length 4.2-5 mm.; of wing 4 mm. Face of moderate 

 width, silvery white. Front darl^ shining green. Antennae wholly 

 black; third joint about as long as wide, slightly pointed at tip. 



