Vol. XI] CURRAN— REVISION OF THE PIPIZA GROUP 367 



four tibiae except a median broad, incomplete band, and front and middle 

 of middle and narrow base of hind tibia?, first three joints of front and two of 

 middle tarsi, yellowish; pile whitish; middle tibia; produced in front; hind 

 coxal spur sharp, its base large, tip directed outward; trochanteral process 

 moderately long. Wings cinereous hyaline; stigma luteous; last section of 

 fifth vein straight. 



Female: White pilose; front black pilose, across the middle with cinereous 

 or white pile; vertex with white pile; pile of the posterior orbits, including oc- 

 cipital cilia, white; face receding to below the middle, thence perpendicular. 

 Antenna? black, second joint apically and the third below, yellow; third joint 

 nearly twice as long as wide, the end rounded more gradually above. Side 

 stripes of the face markedly enlarged below the antenna;; of the frons elongate 

 triangular, their upper ends rectangular; eyes with short cinereous pile above, 

 white below. Thorax shining greenish black: scutellum black, densely punc- 

 tured, appearing granulated. Abdomen purplish black, white pilose with the 

 posterior margins of the second to fifth segments black pilose. Legs as in 

 the male. Wings hyaline; last section of fifth vein bent outwards beyond 

 the middle. 



Holotype, male, No. 860, Mus. Calif. Acad. Sci., 

 June 8, 1919, H. Curran collector. Allotype, female, 

 No. 861, Mus. Calif. Acad. Sci., Orillia, Ont., Sept. 1, 

 1914, H. Curran collector. Paratypes, six males and 

 four females, Orillia and Jordan, Ont., May to Sep- 

 tember, and one pair, Madison, Wisconsin (Fluke col- 

 lector), in collection of the author. 



Type locality, Jordan, Ontario. 



26. Cnemodon nudifrons, new species 



Habitat: Oregon! Female: Length, 5 mm. Wholly shining black. Face 

 and frons whitish pilose; frons without white pollinose spots; sides of face 

 narrowly whitish pollinose; epistoma prominent; eyes extremely short brown 

 pilose. Antenna? luteous; first joint black, third orbicular; occipital cilia 

 cinerescent. Thorax light pilose, the pile longer on the pleura;. Abdomen 

 two-thirds as broad as long; pile short, whitish, the posterior margins of the 

 segments inconspicuously black pilose; ovipositor brownish, its tip bifurcate. 

 Legs black; knees, tips of all the tibiae and all the tarsi, yellowish, the apical 

 joints of the tarsi reddish. Wings hyaline; stigma luteous; last sections of 

 fourth and fifth veins almost straight. Halteres whitish yellow. 



Holotype, female, No. 877, Mus. Calif. Acad. Sci. , 

 collected by Prof.A.L.Lovett, received from Mr. P.W. 

 Fattig, Gainsville, Florida, and presented by him to the 

 California Academy of Sciences. 



Type locality , Mount Jefferson, Oregon. 



Easily recognized by the absence of the white polli- 

 nose spots on the frons possessed by all other known 

 American species. It may prove to be an European 

 species. 



