152 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



bent near its basal third; hind margin of wing not indented at tip 

 of fifth vein; anal angle prominent. 



Redescribed from the type specimen and 8 males. Two of the 

 latter were taken by C. W. Johnson at Niagara Falls, New York, 

 June 23; I took 3 at Niagara Falls, Ontario, July 31, 1910; R. C. 

 Shannon took 1 at Dead Run, Fairfax County, Virginia, June 22, 

 1915; and 2 were taken at Plummers Island, Maryland, May 9, 1914. 



Type locality. — New Bedford, Massachusetts. 



Type. — In American Museum of Natural History. 



No. 104. DOLICHOPUS FLAVICILIATUS, new species. 



Male. — Length 4 mm.; of wing the same. Face rather narrow, 

 being narrowest below, brownish, in the type almost black near the 

 antennae, only a little silvery at its extreme lower edge. Front 

 shining green. Antennae (fig. 104a-) whoUy black, second joint 

 small; third large, twice as long as wide, rather obliquely cut off at 

 tip so as to form a point at upper apical angle; arista about as long 

 as the antenna and inserted near apical third of third joint. Lateral 

 and inferior orbital cilia yellowish, a few of the upper cilia black. 



Thorax dark green, not very shining; pleurae duUed wath gray 

 poUen. Abdomen green; last two segments with coppery reflections; 

 the white pollen on its sides conspicuous. Hypopygium black; 

 its lamellae (fig. 1046) of moderate size, somewhat oval in outline, 

 a little longer than wide, with a small notch near the middle of the 

 apical margin, which cuts nearly through the black border, below 

 this the apical margin is jagged and bristly, above and on upper edge 

 they are fringed with rather long fine hairs. 



Fore coxae yeUow, with a large blackish spot at base on outer 

 side, anterior surface with delicate yeUow hairs, a few minute black 

 ones near the tip on inner edge. Middle and hind coxae black with 

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

 each with one preapical bristle, the latter ciliated with yellow hairs 

 as long as the width of the femora, on lower inner edge for two thirds 

 their length, and with long black hairs on upper edge. Posterior 

 tibiae black at tip for one-fifth their length, thickened, glabrous 

 on most of their inner side, except on apical fourth. Fore and 

 middle tarsi about one and a fourth times as long as their tibiae, 

 black from the tip of the first joint, first joint of each as long as the 

 two following taken together; fifth joint of fore tarsi longer than 

 tibiae the fourth; middle basitarsi without a bristle above, their 

 with one bristle below. Calypters, their cilia and the halteres 

 yellow. 



Wings (fig. 104) slightly grayish; costa with a knotlike enlarge- 

 ment at tip of first vein; last section of fourth vein bent at its middle, 



