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



Holotype, male, No. 843, Mus. Calif. Acad. Sci., July 

 12, 1918, (E. P. Van Duzee). Allotype, female, No. 844, 

 and two paratypes, females, same data, in Mus. Calif. 

 Acad. Sci. One paratype, same data, in collection of 

 the author. 



Type locality, Cay ton, Shasta Co., California. 



A very distinct and beautiful little species. The black 

 tarsi are distinctive and I know of no other American 

 species with distinctly reddish pile on the thorax. 



7. Pipizella fraudulenta (Loevv) (Figs. 11, 39) 



Pipiza fraudulenta Loew, Century, vi, No. 41,1865; 

 Williston, Synop. N. Am. Syrph., 26, 1886. 



Habitat: New York (Lw.); Ontario! Black, con- 

 siderably opaque, mostly whitish pilose; front basitarsi 

 slightly, hind ones considerably, incrassate; wings 

 cinereous or cinereous hyaline; last section of fifth lon- 

 gitudinal vein oblique in male. 



Length, 5.5 to 7 mm. Male: Face and frons shining bluish black, black 

 pilose, middle of face and vertex whitish pilose; sides of face and frons narrowly 

 whitish pollinose; frontal triangle usually opaque above. Antenna; black, third 

 joint slightly over twice as long as wide; eyes short black pilose, across middle 

 with a narrow, almost bare, horizontal stripe; occipital cilia black, except at 

 vertex. Thorax and scutellum shining bluish black, whitish pilose; scutellum 

 sometimes with a shallow apical groove, its apex with a few black hairs. 

 Abdomen opaque black, sides narrowly shining; sides of second segment in 

 middle usually with a pair of large, shining, broadly separated spots, projecting 

 from shining lateral margins; third segment always with large spots, apical 

 one-half to two-thirds of fourth segment shining. Black pile covers the opaque 

 areas except anterior half of second segment; tip of fourth segment and hypo- 

 pygium also black pilose; elsewhere the pile is white. Legs black; tips of all 

 the femora, base of anterior four tibia; and basal joints of their tarsi, tip of hind 

 basitarsi and the two following joints, yellowish. Sometimes basal half of front 

 four tibia; and base of hind tibia; are yellowish. Front basitarsi slightly, the 

 hind considerably, incrassate. Wings cinereous, except often basal third ; 

 stigma luteous; last section of fourth vein bent near its middle, of the fifth, 

 oblique, straight or gently curved. 



Female: Face and front shining black, white pilose; immediately above 

 base of antenna; and across front above, black pilose; face slightly receding, 

 rounded above the middle; antenna; black, base of third joint yellowish or 

 entirely black; this joint slightly constricted on basal third and nearly three 

 times as long as wide; arista yellow at base; eyes very short black pilose, with 

 horizontal bare stripe; occipital cilia white but sometimes with a few black 

 hairs; pollinose spots on front small, triangular, separated from side stripes by 

 about half their width. Thorax and scutellum as in male; abdomen shining 

 bluish black, with whitish pile, usual areas with black pile and usual areas 

 opaque. Legs as in male. Wings cinereous hyaline; stigma luteous; last section 

 of fourth vein bent slightly beyond its middle, of fifth rectangular, usually 

 entirely straight. 



Many of the males have ground color of face metallic 



