THE DIPTEROUS GENUS DOLICHOPUS IN" NORTH AMERICA. 113 



surface of the middle basitarsi, tlie largest of these is larger than is 

 found on the lower surface of most, if not any other, of our species. 



Redescribed from several males and females in the United States 

 National Museum; they were taken on Popoff Island, Alaska, July 8, 

 and St. Paul Island, Alaska, August 11, by T. Kincaid; and 2 pairs 

 taken by J. S. Hine, at Katmai, Alaska, August. 



Location of type unknown. It is European. 



No. 69. DOLICHOPUS FUCATUS, new species. 



Male. — Length, 5 mm.; of wing, 4 mm. Face of moderate width, 

 silvery white. Front shining green with coppery reflections in the 

 center. Antennae wholly black; third joint about as long as wide, 

 somewhat orbicular in outline, but slightly pointed at tip. Lateral 

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



Thorax shining green with slight coppery reflections, which form 

 indications of two vittae on the anterior edge of the dorsum; pleurae 

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

 sures and coppery reflections; the white pollen on the sides not very 

 abundant. Hypopygium black; its lamellae (fi^. 69a) rather large, 

 somewhat triangular in outline, but a little rounded at apex, white 

 with a narrow black border, jagged and bristly at lower corner; other- 

 wise fringed with black hairs. 



Coxae black; anterior pair yellow at tip for about half their length 

 on the front side; middle and hind pairs narrowly yellow at tip. 

 Femora yellow. Middle and hind femora each with one preapical 

 bristle, the latter black at tip as far as the preapical bristle, without 

 cilia below. Tibiae yellow; posterior pair black at tip for one-fifth 

 their length, the glabrous stripe on upper surface distinct, occupying 

 the space between the rows of large bristles, which are rather widely 

 separated; 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 remaining four joints taken together; second 

 joint slightly longer than the third; third and fifth of nearly equal 

 length; fourth slightly shorter. Hind tarsi wholly black. Middle 

 tibia with one bristle below, its basitarsus without a bristle above. 

 Calypters and halteres yellow, the former with yellow cilia;- still some 

 of these cilia appear brown or blackish in certain lights. 



Wings (fig. 69) grayish, strongly tinged with brown in front of 

 second vein; costa scarcely enlarged at tip of first vein; last section 

 of fourth vein a little bent at its middle; hind margin of wing slightly 

 indented at tip of fifth vein; anal angle not at all prominent, the 

 wing being narrowed at base. 



Described from 1 male taken on Mount Constitution, Orcas Island, 

 Washington, July 7, 1905, by J. M. Aldrich. 



ri/2>«-— Male, Cat. No. 23013, U.S.N.M. 



