250 CALIFORNIA ACADEMY OF SCIENCES [Proc. 4th Ser. 



jecting beyond the oral margin about the length of the 

 labellae; palpi yellow with short yellow hairs. Frontal tri- 

 angle and face pruinose, with short yellow pile except at 

 apex of the triangle, the pile of the oral margin longer. 

 Antennae black, the styliform portion of the third joint about 

 as long as the thick basal portion. Eyes separated by less 

 than width of front ocellus. 



Thorax shining black with yellow and white tomentum 

 and faint indications of three white vittae. Pile and bristles 

 yellowish. Scutellum rounded, shining black, and bare 

 except for a basal line of orange-yellow scales; the scales 

 just in front of the scutellum obscuring the ground color. 

 Pleura and coxae densely gray pollinose with some yellow- 

 ish and white pile. Femora black except the yellowish tip; 

 the tibiae reddish yellow; first three joints of tarsi yellowish, 

 the last two brown. Wings hyaline; subcostal cell yellow, 

 the costal and first vein yellowish brown, the rest blackish. 

 Halteres yellow. Abdomen shining black with yellowish 

 and white scales, denser at the bases of the segments. Pile 

 at sides of first segment erect, whitish, bristle-like, the rest 

 of the pile sparse and whitish. Venter densely covered with 

 white tomentum and white pile. Most of genitalia black, 

 more or less yellow below. 



Female: Much like the male. Proboscis projecting al- 

 most half its length beyond the oral margin. The upper 

 half of frons shining black with a few short black hairs; 

 lower half pruinose and yellow pilose, the shining black 

 reaching down a little on the sides (see fig. 21). Last ab- 

 dominal segment laterally compressed, with a fringe of short 

 golden pile. 



Holotype, male, No. 833, and allotype, female, No. 834, 

 Mus. Calif. Acad. Sci.; F. R. Cole, collector, June 14, 1917. 

 These types are on the same pin and were taken in coitu. 



Type locality, Mosier, Oregon. 



This species is near E. pallidus Cresson, but has a long 

 antennal style; most of the wing veins are blackish, the 

 scutellum not emarginated and no brown tomentum on 

 abdomen. In E. modestus the lower part of the face is 

 polished. 



