Vol. XI] CURRAN— REVISION OF THE PIPIZA GROUP 357 



848, Mus. Calif. Acad. Sci., collected by F. R. Cole 

 and received from Prof. A. L. Lovett. Paratypes, four 

 males, same data, and one male, California, W. M. 

 Davidson, in collections of Prof. Lovett, Mr. Davidson 

 and the author. 



Type locality, Hood River, Oregon. 



13. Heringia californica (Davidson) 



Pipiza californica Davidson, Ent. News, XXVIII, 

 p. 417, 1917. 



Habitat: California! Length 9 mm. Male: Face and front metallic 

 bluish black; face receding, yellow pilose with a few darker hairs on the sides; 

 front slightly swollen, black pilose with yellowish pile above; antennae black, 

 yellowish below, nearly twice as long as wide, sides parallel, apex obtusely 

 rounded; vertical triangle with cinereous yellow pile; pile of eyes and posterior 

 orbits yellowish; occipital cilia black. Thorax and scutellum shining metallic 

 black, yellowish pilose, the latter with a shallow apical groove. Abdomen 

 shining black, yellowish pilose; usual areas not so extensively blackish-pilose 

 as usual; hypopygium with a few black hairs toward apex. Legs black; knees, 

 front four tibise more broadly, and the basal two joints of their tarsi, yellowish. 

 Wings cinereous hyaline; stigma luteous. 



Female: Head and thorax shining purplish black; abdomen slightly brassy 

 black, metallic. Antenna? black; third joint over twice as long as wide, more 

 pointed and reddish below; face and front clothed with long yellowish white 

 pile; immediately above each antenna with black pile, across the front above 

 intermixed with black hairs; side spots of the front about twice as broad as 

 long, separated by about two-thirds width of one spot. Eyes with rather long 

 whitish pile. Thorax and abdomen white pilose, on dorsum of thorax more 

 yellowish, on posterior margins of second and third abdominal segments 

 black. Legs and wings as in the male. 



Male and female, Walnut Creek, California, received 

 from Mr. W. M. Davidson. 



Genus Cnemodon (Egger) 



Middle tibise of males strongly produced anteriorly 

 (Fig. 4), of the females rounded in front (Fig. 8) ; Males: 

 Middle coxae armed with a moderately long slender 

 process (except in unicolor); hind trochanters armed 

 with long processes (except in the first four species, see 

 fig. 48), the hind coxse often with a spur at the outer 

 end. In four species the venter of the fourth segment is 

 armed with a basal spur and a second spur or tubercle 

 on the apical third; arista microscopically pilose to 

 near tip (Fig. 41). The females are much alike, with 

 few characters available for classification and these very 

 difficult to use. 



