272 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



white hairs, which are also found on the front coxae and the pleurae ; 

 halteres with a brown knob. Legs black, in a certain light with a pur- 

 plish reflection. 

 Hdb. — Vancouver Island (G. E. Crotch). A single mate. 



3. Epibates muricatus n. sp., $. — Deep velvet-black ; wings infus- 

 cated ; halteres, including the stem, black ; denticulations of the costa 

 large and distinct. Length 15 mm . 



Whole body uniformly deep black, very opaque on the thorax ; all 

 the pile black, including that on the under side of the head. Halteres 

 altogether black. Front tarsi somewhat brownish. The sharp, rigid 

 points with which the thoracic dorsum is beset are very distinct, and of 

 different sizes; some are quite large; short, black pile among them. The 

 wings are comparatively broader here than in the two preceding species; 

 they are tinged with brown, the centers of the cells being somewhat 

 paler; the latter portion of the costal cell dark browu; small cross- 

 veins somewhat clouded; anterior branch of the third vein strongly bisin- 

 uate, almost S-shaped; discal cell somewhat broader and shorter than in 

 E. funestus and luctifer; posterior cells 2, 3, 4, and especially the last, 

 much shorter, the posterior cross-vein being a little farther from the 

 proximal end of the discal cell. 



Hdb. — Sierra Nevada, California (H. Edwards). A single male. 



4. Epibates marginatus n. sp., ?. — Black, beset with whitish pile, 

 which forms fringes on the hind margins of the abdominal segments; 

 wings infuscated. Length 8 mm . 



Antennae comparatively longer than in E. fanestus, owing to the 

 length of the first joint, which is distinctly longer than the third ; they 

 are black, beset with black pile. Head black, slightly whitish-pollinose 

 along the inner orbits, beset with black pile on face and front, and with 

 white pile on the under side and occiput; face rather projecting. Tho- 

 rax black, subopaque, beset with long whitish pile, more dense and of 

 a purer white on the pleurae and coxae. Abdomen deep velvet-black ; 

 hind margins of the segments with a fringe of short whitish pile; the 

 last segment smooth, shining. Halteres with a brownish-white stem 

 and brown knob. Legs black. Wings tinged with blackish-brown, 

 which is more saturate 'along the veins, so that the inner portion of the 

 cells is paler ; the darker color of the base and of the anterior margin 

 is very gradually evanescent posteriorly. The hind femora, on the 

 under side, besides the usual pile, have two minute, stiff, spine like 

 bristles. 



Hob. — San Francisco, Cal. (H. Edwards). 



5. Epibates magnus n. sp., 2 . — Altogether black ; thorax deep vel- 

 vet-black, with black pile ; occiput beset with yellowish-white pile ; first 

 abdominal segment with a fringe of white pile ; wings tinged with brown ; 

 second basal, anal, and axillary cells hyaline. Length 12-13 mm . 



Head beset with black pile, except on the occiput, where it is yellow- 

 ish-white ; front very little shining, with a faint trace of grayish pollen. 





