THE DIPTEROUS GENUS DOLICHOPUS IN NORTH AMERICA. 131 



the hind margms of the segments. Hypopygium black; its lameUae 

 rather large, somewhat oval in outline, yellowish with rather broad 

 black border, jagged and bristly at apex; these bristles extend weU 

 toward the base on upper edge. 



Fore coxae yeUow with a black or greenish spot at base on outer 

 side, anterior surface with black hairs. Middle and hind coxae 

 black with their extreme tips yellow. Femora and tibiae yeUow. 

 Middle and hind femora each with one preapical bristle, the latter 

 ciliated below with long yeUow hairs, the longest of which are nearly 

 twice as long as the width of the femora. Posterior tibiae only a Uttle 

 thickened and with apical third black. Fore tarsi (fig. 85a) about 

 one and a half times as long as their tibiae; the first three joints 

 slender, yeUow, fourth black, a little compressed, widened at tip, 

 being nearly as wide at tip as it is long, fifth black, much compressed 

 and widened, oval, about as long as third and two-thirds as wide as 

 long. Middle tarsi a little longer than their tibiae, black from the 

 tip of the first joint, the first joint sometimes blackened almost to 

 the base. Hind tarsi whoUy black. Calypters and halteres yeUow; 

 the former with black cilia. 



Wings (fig. 85) dark grayish; costa with an elongated enlargement 

 at tip of first vein, which is as long as the cross vein; last section of 

 fourth vein bent just before its middle; hind margin of wing scarcely 

 indented at tip of fifth vein; anal angle rather prominent. 



Female.- — Face wide, gray; third antennal joint scarcely as long as 

 wide; fore tarsi plain, a little longer than their tibiae, infuscated from 

 the tip of the first joint, which is a little shorter than the remaining 

 four taken together, third a very little shorter than the second, fifth 

 longer than the fourth; hind femora without cilia below; hind tibiae 

 blackened at tip for one-fOurth their length; middle basitarsi with a 

 large bristle above; costa without an enlargement at tip of fifth vein, 

 still it is a little thickened at that point, tapering to its tip. 



Kedescribed from 3 males from Sweden (Aldrich) . Mr. Kennicott 

 took specimens at Fort Resolution, Hudson Bay Territory, which 

 Doctor Loew compared with European specimens and considered 

 the determination correct. The description of the female is from 

 this material, the males seem to have been destroyed. 



No. 86. DOLICHOPUS DASYOPS Malloch. 



Dolichopus dasyops Malloch, Report Canadian Arctic Expedition, vol. 3, pt. C, 

 1919, p. 49. 



The following is the origiaal description by Mr. MaUoch: 



Male. — Blue-black, with a distinct cupreous tinge. Antennae and arista black; 

 face black, with dense yellowish brown pile; palpi yellow; proboscis black; postocular 

 cilia entirely black; hairs on eyes yellow. Dorsum of thorax with coppery tinge; 

 fringes of squamae black. Hypopygium black, lamellae white, blackened on apical 



