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



lighter pile; pile of vertical triangle long, whitish. Antennae black, whitish 

 pollinose; third joint nearly as broad as long, sub-quadrate. Eyes whitish 

 pilose, appearing yellowish in some lights; pile of posterior orbits long, whitish; 

 occipital cilia blackish. Thorax and scutellum slightly shining bluish black 

 with long whitish pile. Abdomen bluish black, not much shining, black pilose; 

 on each segment a large pair of triangular spots of long white pile, narrowly 

 separated; sides of abdomen mostly long whitish pilose; hypopygium black 

 pilose; venter of fourth segment a little emarginate in middle at apex. Legs 

 black, whitish pilose except apical quarter of hind femora which bear black 

 pile; tips of all femora and tibiae at base yellow; anterior tibiae and the tarsi 

 piceous, the last two joints of hind tarsi black; hind femora moderately en- 

 larged, near end with the usual spinose area. Wings luteous hyaline, the basal 

 third lighter. 



Holotype, male, No. 875, Mus. Calif. Acad. Sci., 

 July 31, 1913, H. Curran collector. 



Type locality, Severn River, Ontario. 



Allied to femoralis, but slightly larger, with the black 

 and white pile clearly defined, giving a neater appear- 

 ance even though the pile is longer. The mostly black 

 pilose face, more yellowish wings and emarginate venter 

 of fourth segment will at once distinguish this species. 

 The Severn River here referred to is a small river run- 

 ning from Lake Simcoe to Georgian Bay, and not the 

 river of that name emptying into Hudson Bay. 



47. Pipiza oregona (Lovett) (Fig. 29) 

 Lovett, Proc. Cal. Acad. Sci., 4th ser., vol. ix, p. 246, 

 August, 1919, (New Oregon Diptera) 



Habitat: Oregon! California! An entirely black, 

 light pilose species; readily distinguished from any other 

 by the entirely black legs and narrowly contiguous eyes. 



Length, 7.5 to 9 mm. Male: Face and frons shining black, lightly dusted 

 with whitish pollen; face entirely whitish pilose or with a few black hairs in 

 middle; front black pilose, lighter above; vertical triangle cinerescent pilose, 

 with black hairs in front. Antennae black; third joint sub-cordate, reddish 

 brown or brownish, with the rather thick arista of the same color but darker 

 towards tip. Eyes only actually touching for about seven facets, whitish 

 pilose; post orbital pile whitish; occipital cilia black. Thorax and scutellum 

 slightly shining black, with luteous or yellowish white pile; thorax across the 

 front narrowly blackish pilose, continued back on the sides behind the humeri, 

 or with only a few black hairs in front; pleurae whitish pilose. Pile of scutellum 

 more whitish than on the thorax. Abdomen slightly metallic bluish black, 

 the usual areas darker and with black pile; elsewhere the pile is lighter and 

 longer; hypopygium mostly whitish pilose above, black pilose below. Legs 

 entirely black, white pilose; anterior tibiae yellow pubescent below apically; 

 knees black pilose; tarsi below velvety reddish pubescent; femoral spinose 

 area well marked. Wings clouded with luteous or brownish, more so in the 

 middle; stigma luteous. 



Redescribed from two paratypes and an additional 



