122 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



Described from 1 male taken at Franconia, New Hampshire, by 

 Mrs. Slosson; and 1 male from Moosohead, Maine, July 18, taken by 

 C. W. Johnson. 



Type.— Ma\e, Cat. No. 23016, U.S.N.M., from Franconia, New 

 Hampshire. 



No. 78. DOLICHOPUS TRISETOSUS, new species. 



Male. — Length 4 mm.; of wing 3.5-4 mm. Face rather wide, yel- 

 lowish. Front green or blue with violet reflections. Antennae (fig. 

 78a) black; first joint j^ellow below; third joint a little longer than 

 wide, somewhat oval, but a little pointed at tip. Palpi yellow. 

 Lateral and inferior orbital cilia ^^ellowish white, about eight of the 

 upper cilia on each side black. 



Thorax green with blue or bronze reflections; dorsum with rather 

 abundant brownish pollen, which is more gray along the front edge; 

 pleurae dulled with white pollen. Abdomen green with black inci- 

 sures and sometimes with coppery reflections; the white pollen on its 

 sides abundant and extending upon the dorsum. Hypopygium 

 black; its lamellae of moderate size, somewhat oval in outline, about 

 one and a half times as long as wide, white with rather wide black 

 border on upper and apical margins, jagged and l^ristly at apex, 

 fringed above with rather long stout hairs and a little notched or 

 jagged. 



Fore coxae yellow with a black spot on outer surface at base, their 

 anterior surface with white pollen and minute black hairs. Middle 

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

 Middle and hind femora each with a longitudinal row of three (some- 

 times only two) large bristles near the tip, the latter black at tip, 

 except below, ciliated on lower inner edge of apical half or more with 

 rather stout hairs, which are about three-fourths as long as the width 

 of the femora; these hairs are usually deep black, but are sometimes 

 reddish or yellow in certain lights. Posterior tibiae a little thickened, 

 black at tip for one-fifth their length, the glabrous stripe on upper 

 surface between the large bristles distinct; there is another glabrous 

 stripe on inner surface which is wide near the base and becoming 

 narrow at the tip of the tibiae ; it is separated from the upper strii>e 

 by the inner row of bristles and a ievr small hairs between these 

 bristles. Fore and middle tarsi a little longer than their tibiae, 

 black from the tip of the first joint, the former with the first joint 

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

 of nearly equal length, third only a little longer than fourth. Hind 

 tarsi one and a third times as long as their tibiae, wholly black. 

 Calypters and halteres yellow, the former with black cilia. 



Wings (fig. 78) grayish; costa with a small knotlike enlargement 

 at tip of first vein; last section of fourth vein a little bent just before 



