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



and scutellum shining black, dorsum of former less shining; pile black, on disc 

 and pleura? more brownish; scutellum with a moderately well-marked apical 

 groove. Abdomen opaque black; first segment in middle, margins of second, 

 more broadly in middle, and posterior angles of third and fourth shining; 

 apex of fourth segment opaque; pile black, moderately long, on sides of second 

 segment in front brownish; hypopygium sub-opaque with short black pile. 

 Legs black; tips of all the femora, narrow base of hind and broad base of front 

 tibiae and their tips, yellow; anterior tibia? piceous in front; front tarsi yellow, 

 their sub-apical joints and hind tarsi piceous; middle tibia? produced anteriorly; 

 pile of legs black. Wings evenly cinereous; last section of fourth vein bent at 

 its proximal quarter; apex of discal cell very acute; last section of fifth vein 

 almost straight; stigma luteous. 



Holotybe, male, No. 849, Mus. Calif. Acad. Sci., 

 June 22, 1913 (Curran). 



Type locality, Guelph, Ontario. 



At once distinguished by the produced middle tibiae 

 and the absence of coxal or trochanteral processes. 



15. Cnemodon intermedia, new species (Figs. 14, 16, 35, 45, 46) 



Habitat: Ontario! Middle coxae with processes, hind 



trochanters without processes; abdomen largely opaque, 



pile black, on the shining areas brownish ; pile of thorax 



brownish with a black pilose band in front. 



Male: Length, 6.5 mm. Face in profile almost straight from antenna? to 

 oral margin, sides whitish pollinose; frons moderately swollen, opaque above; 

 face and frons with moderately long black pile; antenna? black, second joint 

 apically and third below, basally, yellowish; third joint sub-rectangular; 

 vertical triangle and occipital cilia black pilose; eyes whitish pilose below, the 

 pile becoming longer and brownish above. Thorax and scutellum black, the 

 former slightly metallic; pile brownish, that of thorax in front and a few hairs 

 on apex of scutellum black; scutellum moderately large, with an apical groove. 

 Abdomen opaque; first segment, small lateral median spots on second, larger 

 spots on third, sides of fourth segment posteriorly, and the hind margin, 

 shining; pile black, on the sides of all segments in the middle and on the shining 

 areas, brownish. Legs black; tips of all femora, base of hind tibia?, front four 

 tibia? except a broad median black band, sometimes incomplete, and first 

 two joints of front four tarsi, yellow; middle tibia? produced anteriorly but not 

 concave beneath; middle coxa? with a long slender process beneath. Wings 

 cinereous, more hyaline on basal third and posteriorly; stigma luteous. 



Female: Length, 5.5 mm. Face and front shining black; face and vertex 

 white pilose; front black pilose, with lighter, somewhat yellowish pile across 

 the middle; side spots of front separated by more than width of one spot; 

 front with a broad depression below middle. Antenna? black; second joint and 

 third below broadly yellow, third joint larger than in male, its apex more 

 rounded. Pile of eyes rather sparse, short, dark. Thorax and scutellum 

 shining black, slightly cupreous, whitish pilose. Abdomen shining, darker 

 areas not distinct; pile black and white as usual. Legs colored as in the male; 

 wings very slightly darkened. 



Holotype, male, No. 850, Mus. Calif. Acad. Sci., 

 June, 12, 1913 (Curran). Allotype, female, No. 851, 

 Guelph, Ont., July 13, 1913, (Curran), Mus. Calif. 

 Acad. Sci. Paratypes, two males, two females, Guelph, 



