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



or collector's label, but probably taken by Mr. Davidson, 

 in the United States National Museum. 



Paratype, male, Fairfax, California, April 16, 1913, in 

 the Museum of the California Academy of Sciences. 



This species is very readily recognized by the slender 

 femora and the peculiar narrow shining facial stripe. 



41. Pipiza latifrons, new species 



Habitat: California! Front very broad, nearly as 

 wide as face; face scarcely widened below; abdomen 

 sparsely and very short white pilose; hind femora 

 slender. 



Female: Length, 7.5 mm. Face and front deep shining black, very thinly 

 covered with whitish dust, with a few black hairs above the antennae (the pile 

 of the head has been brushed off to a large extent but from a careful examination 

 I believe the front to have been almost entirely white pilose, although it may 

 have been cinereous in front of the ocelli). Sides of face and front to above 

 middle narrowly, not very conspicuously, whitish pollinose. Antennae black, 

 second and third joints more brownish, second at tip and third below obscurely 

 luteous. Eyes with very short, sparse white pile. Occipital cilia and pile of 

 posterior orbits white. Thorax and scutellum black with a brassy reflection 

 on the dorsum, leaving two broad median stripes shining steely black; pile 

 very short, white; scutellum very densely punctured, finely granulate. Ab- 

 domen somewhat shining deep black, densely finely punctulate, with short 

 white pile; pile longer on basal angles, on the usual dark pilose areas cinereous, 

 not conspicuous. Legs black; tips of femora, narrow base of hind and base of 

 anterior four tibiae, apices of all the tibiae, the hind ones very narrowly, and 

 all the tarsi, yellowish; apical joints of all the tarsi a little darker; pile all white, 

 on femora and hind tibiae moderately long. Wings hyaline; auxiliary vein 

 and stigma luteous. 



Holotype, female, No. 873, Mus. Calif. Acad. Sci., 

 May 12, 1910, J. A. Kusche collector. 



Type locality, Sobre Vista, Sonoma Co., Calif. 



Evidently close to P. davidsoni but the color is mark- 

 edly different and the face is much too short and not 

 rounded so it cannot be the female of that species. 

 There are other differences. 



42. Pipiza quadrimaculata (Panzer) 



Syrphus quadrimaculata, Panzer Fauna Germ., 

 LXXXVI, tab. 19, 1802. 



Habitat: Europe; Ontario! United States; British 

 Columbia. "Abdomen with two pairs of yellow spots; 

 antennae short and blunt. 



"The two large spots near the base of the abdomen more conspicuous 

 than the next two, which are smaller and redder; wings only a little darkened 



