THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 129 



on fore femora as long as the width of the femora, those on middle 

 and hind pairs longer than their width. Middle and hind femora 

 each with a longitudinal row of from three to five long bristles near 

 the tip, the latter also with a row of long hairs above near the base. 

 Tibiae with long stout bristles ; posterior pair black at tip for nearly 

 one-fomth their length; they have a glabrous stripe on inner surface 

 of basal half. Fore and middle tarsi a little longer than their tibiae, 

 the former yellowish becoming brown toward their tips, the latter 

 black from the tip of the first joint. Hind tarsi wholly black. Calyp- 

 ters and halteres yellow, the former with long black cilia. 



Wings (fig. 83) grayish; costa with an elongated enlargement at 

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

 margin of wing indented at tip of fifth vein, and with just a sugges- 

 tion of a lobe at tip of sixth vein caused by the anal angle narrowing 

 toward the root of the wing. 



Female. — Face broad, its pollen more silvery white, the cilia on 

 the lower edge of the femora represented by short black hairs ; middle 

 tibiae with one or two bristles below and a row of five on the lower 

 front edge; hind margin of wing more evenly rounded, the anal angle 

 not being cut off obliquely as in the male. Middle basitarsi with a 

 large bristle above. 



Redescribed from 2 males and 2 females from Europe (Aldrich). 

 Van der Wulp reports it from Wisconsin. 



No. 84. DOUCHOPUS BARBIPES, new species. 



Male. — Length 4-4.3 mm.; of wing 3.5 mm. Face rather wide, 

 long, silvery white. Palpi unusually long, white, reaching beyond 

 the brown proboscis, Front shining green. Antennae wholly 

 black; first joint long, not widened at tip; as long as second and third 

 taken together; third joint longer than wide, somewhat oval in out- 

 line. Orbital cilia wholly black. Proboscis black, palpi large, oval, 

 snow-white. 



Thorax shining green with bronze reflections, which color some- 

 times forms two lines, one each side of the acrostichal bristles, and 

 with a very little white pollen on the front dorsum; pleurae usually 

 with blue reflection, a little dulled with gray pollen. Abdomen 

 green with coppery reflections, the apical segments mostly coppery; 

 there are usuaUy some blue reflections on the sides near the base. 

 Hypopygium black; its lamellae large, somewhat oval, whitish, 

 with a narrow black border on apical margin, which is jagged and 

 bristly, fringed with delicate hairs on upper and lower edges. 



Fore coxae whoUy yellow, their anterior surface covered with 

 silver}^ pollen, bare, except for the usual bristles at tip. Middle and 

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



