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



Holotype, male, No. 879, Mus. Calif. Acad. Sci. , May 

 16, 1920, H. Curran collector. 

 Type locality, Jordan, Ontario. 



18. Cnemodon cevelata, new species (Figs. 50, 51) 

 Habitat: Ontario! Small; hind trochanteral process 

 short, compressed and broadened; third antennal joint 

 broader than long. 



Length, 5.5 mm. Male: Face and frons shining bluish black; face whitish 

 pilose, with a few black hairs on sides; frons with black vertical triangle with 

 cinereous pile; antennae black, third joint orbicular, yellowish basally below; 

 eyes with short black pile, almost bare below. Thorax and scutellum shining 

 black; pile sparse, long, wavy, whitish. Abdomen slightly shining black, 

 opaque markings not conspicuous; pile inconspicuous except on the sides where 

 it is long, whitish; the usual areas with blackish pile; hypopygium shining, 

 inconspicuously short black pilose. Legs black; tips of all the femora, front 

 tibiae and their tarsi, base and apex of middle tibiae and their tarsi, and base 

 of the hind tarsi narrowly, piceous; middle tibiae produced in front; hind basi- 

 tarsi slightly incrassate; trochanteral process short, compressed and broadened, 

 piceous; middle coxal processes black, the ends rounded. Wings cinerescent, 

 more marked anteriorly about the middle; last section of fifth vein almost 

 straight. ... 



Female: Very similar to intermedia but third antennal joint shorter, only 

 one and one-half times as long as wide (in intermedia it is twice as long); 

 second joint black; face considerably black pilose about the oral margin; 

 lighter pile of the front brownish intermixed with black; thorax and abdomen 

 similar; legs black, tips of all the femora, broad base of all and tips of front 

 four tibiae and first two joints of their tarsi, yellowish; wings very slightly 

 yellowish. 



Holotype, male, No. 852, Mus. Calif. Acad. Sci., 

 June 2, 1913 (Curran). Allotype, female, No. 853, 

 Mus. Calif. Acad. Sci., Jordan, Ont., June 22, 1919 

 (Curran). 



Type locality, Guelph, Ontario. 



The extremely large roundish third joint of the an- 

 tennae is a good character for distinguishing the female 

 while the short trochanteral process will at once dis- 

 tinguish the male from other species. The foregoing 

 species form a very interesting series, representing the 

 primary stages in the development of the long processes 

 on the hind trochanters. 



19. Cnemodon elongata, new species (Fig. 47) 

 Habitat: Ontario! Differs from calcarata in the ab- 

 domen being inflated and conspicuously narrower and 

 not white pilose; the middle tibiae with more abrupt and 



