340 BULLETIN UNITED STATES GEOLOGICAL SURVEY. 



crassated; hind tibiae rather stout and somewhat curved. Wings sub- 

 byaline, grayish. 



Hab.— Santa Barbara, Cal. Two males and one female. I reared 

 these specimens from pupae which I had found under the bark of an 

 evergreen oak (Q. agrifolia), in February. 



Syritta pipiens Lin. is common in California, Nevada, and Colo- 

 rado. 



CHR YSO CHL AM YS . 



I possess three North American species of this genus, all of which 

 seem to be different from the only North American species hitherto 

 described, C. buccata Loew. The four species may be tabulated as fol- 

 lows : — 



Arista black 4. croesus. 



Arista reddish : 



Legs entirely reddish-yellow ... 2. dives. 



Anterior femora at base and tips of all the tarsi black. . .1. buccata. 



All the femora brown; tibiae likewise infuscated 3. nigripes. 



As the resemblance in the coloring of all these species is very great, 

 I will first insert Mr. Loew's description, and then describe the other 

 species by merely statiug the differences. 



1. Chrysochlamys buccata Loew, Centur., iv, 72. — Female. 

 Translation. — " Bronze-colored ; scutellum testaceous ; front black, 



with a cross-band of ochraceous pollen in the middle ; antennae black 

 above, rufous below ; arista rufous ; cheeks with a black stripe. Length 

 3 T 7 2 Rhenish lines (a little less than 8 mm ) ; length of wing 3 T 5 ^ lines. 

 Blackish bronze-colored, greenish (' aeneo-nigra, subvirens '), shining. 

 Front deep black, shining, with a short, black pubescence; in the 

 middle a rather broad cross-band of ochraceous pollen. Antennae 

 rather large; first joint deep black, the following joints black above, 

 rufous below ; arista glabrous, rufous. Face testaceous-yellowish, very 

 concave and ochraceo-pollinose above, swollen (< buccata') below, with 

 a large obtuse tubercle, which is somewhat brownish ; cheeks separated 

 from the face by a small black stripe. Thoracic dorsum beset with short, 

 lutescent pile; lateral margins and two longitudinal stripes of even 

 breadth, cinereo-pollinose. Scutellum testaceous, beset with short 

 lutescent pile; bristles along the edge black; lateral corners blackish. 

 Abdomen shining, with short lutescent pile; hind margins of segments 

 1 and 2 deep black, opaque. Legs ochraceous, the proximal half 

 of the four anterior femora and the tips of all the tarsi black; front 

 tibiae, except their base and tip, and the base of the hind femora, slightly 

 subinfuscated. Wings somewhat cinereous-hyaline, lutescent near the 

 base ; costal cell and stigma luteous, the base of the third vein and the 

 cross- veins on the middle of the wing clouded with black." 

 Sab. — Virginia. 



2. Chrysochlamys dives n. sp. — Male and female. — Very like the 



