192 BULLETIN 116, UNITED STATES NATIONAL MUSEUM. 



Coxae yellow; middle pair more or less blackish on outer surface, 

 fore coxae with minute, delicate, yellow hairs on the front surface. 

 Femora and tibiae yellow. Middle and hind femora each with one 

 preapical bristle, the latter ciliated on lower inner edge with long 

 yellowish white hairs, which are fully as long as the width of the 

 femora, these are continued to the base by delicate little yellow hairs, 

 apical fifth nearly bare below. Posterior tibiae with an elongated 

 brown or black shining spot on each side at tip, which leayes only a 

 yellow line aboye and below. Fore tarsi nearly one and three-fourths 

 times as long as their tibiae, pale yellow with the last joint black; 

 second and third joints each a little shorter than the joint preceding 

 it, fourth and fifth joints of about equal length, taken together about 

 as long as third. Middle tarsi about as long as their tibiae, becoming 

 a little infuscated toward their tips. Hind tarsi wholly black; in 

 one of the type specimens the hind basitarsi are yellow with black 

 tips. Calypters, their cilia, and the halteres yellow. 



Wings (fig. 135) slightly tinged with yellowish gray, veins and 

 costa yellowish brown, sometimes almost yellow; costa scarcely 

 enlarged at tip of first vein; last section of fourth vein bent before 

 its middle ; hind margin of wing scarcely indented at tip of fifth vein ; 

 anal angle rather prominent but rounded. 



Redescribed from the 2 type specimens and 3 males from South 

 Dakota taken by J. M. Aldrich; and United States National Museum 

 material from Kaslo, British Columbia, July 17. 



Type ZocaZi^?/.— Washington, District of Columbia. Osten Sacken 

 reports it from Illinois, Melander and Brues from Vancouver Island. 



There are two type specimens on the same pin, one of which has 

 the hind tarsi wholly black, while in the other they are only slightly 

 infuscated from the tip of the first joint. The antennae in both are 

 wholly yellow. 



r?/2Je.— Collection of J. M. Aldrich. 



No. 136. DOLICHOPUS GREENEI, new species. 



Male. — Length 4.5 mm.; of wing the same. Face of moderate 

 width, silvery white. Front shining blue-green. Antennae dark 

 yellow; third joint slightly darker and obtusely pointed at tip, about 

 one and a half tunes as long as wide. Lower orbital cilia pale. 



Thorax green; dorsum with bronze reflections in front, blue and 

 violet on posterior portion, a little dulled with almost invisible 

 brownish pollen; pleurae dulled with white pollen. Abdomen green 

 with bronze reflections; the white pollen on its sides abundant. 

 Ilypopygium black with green reflection on basal portion; its lamellae 

 (fig. 136o) moderately large, somewhat triangular in outline, but 

 with the upper 9,ngle broadly rounded, whitish %vith rather wide 

 black border on the apical and the rounded upper margin, jagged 



