THE DIPTEROUS GENUS DOLICHOPUS IN NOKTH AMERICA. 283 



on inner surface and a little less thickened; middle tibiae with three 

 bristles below, two near apical third and one near basal thnd, their 

 basitarsi without a bristle above; fore tarsi plain, about one and a 

 fourth times as along as their tibiae, brownish, first joint as long as 

 the three following joints taken together, fifth longer than fourth; 

 middle and hmd tarsi more black than in the male. 



Redescribed from the type material m the collection of J. M. 

 Aldrich, and several males. These were taken at Moscow, Vollmer 

 (now Troy) and Potlatch, Idaho, Aug. 24-Oct. 6; Oakland, Cali- 

 fornia, June 7; Fairfax, Marm County, California, Oct. 15, and Pull- 

 man, Washington, Sept. 



Tiife locality. — Moscow, Idaho. Melander and Brues report it 

 from California. 



No. 208. DOLICHOPUS DIGITUS, new species. 



Male. — Length 4.75 mm.; of wing 4.5 mm. Face wide, its sides 

 parallel, silvery white. Front shining green with bronze reflections. 

 Antennae yellow; third joint somewhat orbicular, still a little pointed 

 at tip, which is a little infuscated. Lateral and inferior orbital cilia 

 yellowish, about four of the upper cilia on each side black. 



Thorax gi'een; dorsimi with three broad reddish coppery stripes, 

 the lateral ones inclosing a blue spot at the suture (the metallic color- 

 ing is likely to vary in different individuals), covered with an almost 

 invisible yellowish pollen, which is more gray and conspicuous along 

 the front; pleurae dulled with white pollen; bristles of the thorax 

 inserted in small black dots. Abdomen green with coppery reflec- 

 tions, especially on the apical segments ; the white pollen on its sides 

 abundant. Hypopygium black; its lamellae (fig. 208a) rather large, 

 somewhat triangular, white with a narrow black apical border, jagged 

 and bristly on lower corner, fringed on the rest of the apical margin 

 with little brown hairs. 



Coxae, femora, and tibiae 3''ellow; middle coxae with outer surface 

 mostly blackish, anterior surface of fore coxae with sUvery poUen 

 and very minute pale hairs and a few black ones on upper half of inner 

 edge. Middle and hind femora each with one preapical bristle, the 

 latter without cilia, but with a row of minute yellow hau-s on lower 

 inner edge. Mddle tibiae with three bristles below, two near apical 

 third and one near basal third, their basitarsi without a bristle above. 

 Posterior tibiae a little thickened, especially near their base; the 

 usual glabrous stripe on upper surface distinct and reaching the tip ; 

 inner surface near the base with a glabrous spot extending one-third 

 the length of the tibiae. Fore tarsi (fig. 2086) nearly twice as long 

 as their tibiae, the first two joints taken together fully as long as the 

 tibia; first joint but little longer than the two following taken 

 together; first thi'ee joints and base of fourth yellowish, most of 

 fourth and the whole of fifth black; fifth compressed and with a 



