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



below; arista brown, the base lighter. Pile of eyes tawny brown. Thorax and 

 scutellum slightly shining black; pile tawny; scutellum with a shallow apical 

 groove. Abdomen opaque, the usual areas shining purplish black; pile tawny, 

 the usual areas with shorter black pile; venter of third segment with apical half 

 carinate; fourth segment with a small basal spur and a larger, slightly pointed 

 one on apical third; hypopygium mostly black pilose. Legs black; tips of all 

 the femora, basal third of the hind and basal half of the front four tibiae, and 

 their tips and tarsi, yellow; apical joints of tarsi and hind basitarsi. piceous; 

 hind coxal spurs short and pointed; hind trochanteral processes short, tipped 

 with whitish. Wings densely clouded with pale brownish, except at the base 

 and posteriorly where the cloud is fainter. 



Female: Length, 7.5 mm. Head and thorax shining greenish black; white 

 pilose except immediately above the antennae and across the front above, where 

 the pile is black; spots of the front large, sub-triangular, not touching the eye 

 on their upper half; face rounded above, slightly less receding than in the 

 male; eyes short white pilose. Antennae yellow, third joint blackish on upper 

 third, slightly larger than in the male ; arista brown, its base reddish. Scutellum 

 with an apical groove. Abdomen shining black; pile short, white; apical mar- 

 gins of second and third segments shorter black pilose; black pile nowhere 

 reaching the sides. Legs colored as in the male but the tarsi entirely yellow 

 except basal half of hind basitarsi, which is blackish; hind coxae with a small 

 conical spur. Wings hyaline; stigma yellowish; halteres yellow. 



Holotype, male, No. 867, Mus. Calif. Acad. Sci., 

 June 13, 1913, H. Curran, collector. Allotype, female, 

 No. 868, Mus. Calif. Acad. Sci., Jordan, Ont., June 8, 

 1919, H. Curran collector. 



Type locality, Jordan, Ontario. 



34. Cnemodon ontarioensis, new species (Figs. 61, 67, 68) 

 Habitat: Ontario! Male: trochanteral spurs short, 



slightly pointed; fourth ventral segment with a tubercle 



on apical third. 



Male: Length 7 mm. Face and frons shining bluish black; pile cinerescent, 

 above antennae and in front of ocelli, blackish; eyes with short brown pile. 

 Antennae short, luteous; third joint brownish above, one and one-half times 

 longer than wide; arista luteous at base. Thorax scutellum and abdomen 

 shining black, the latter with the usual areas opaque; pile of thorax luteous; 

 abdominal pile whitish or yellowish, the usual areas with black pile; spur at 

 base of fourth segment straight; tubercle on apical third rather sharp, pilose. 

 Femora black, tips yellow; hind tibiae with base and apex yellow; anterior four 

 tibiae yellow, with broad piceous ring below the middle; tarsi except apical 

 joints, yellow; pile cinereous, on the hind tibiae in front shorter and black. 

 Wings slightly brownish, less so on basal third. 



Female: Length, 6 mm. Shining black, white pilose; front above and im- 

 mediately above the antennae with black pile. Antennae large, black; second 

 joint at apex and third below, yellow; third joint large, twice as long as wide. 

 Face receding, straight to just above the oral margin. Scutellum with an 

 apical impression. Abdomen with the usual areas and apex of the fourth and 

 fifth segments black pilose. Legs colored as in the male; coxal spur small. 

 Wings tinged with luteous; last section of fifth vein bent beyond its middle. 



Holotype, male, No. 869, Mus. Calif. Acad. Sci., 

 June 13, 1913, H. Curran collector. Allotype, female, 



