500 



U. S. NATIONAL MUSEUM BULLETIN 216 



from southern British Columbia to Oregon. It is adult from mid- 

 spring to early fall. It parasitizes buprestids and cerambycids in 

 various hardwoods. 



Id. Xorides (Exomus) humeralis sierrae, new subspecies 



Similar to the subspecies h. humeralis except that the whitish 

 apical margin of the femora and basal 0.15 of the tibiae is replaced 

 by fulvous or brownish, the hind coxa of the female and sometimes of 

 the male is fulvous, the hind trochanters fulvous, and the wings weakly 

 infuscate. 



Type: 9, Yosemite Park at 3,880 to 4,000 ft., Calif., June 31, 1931 

 (Berkeley). 



Paratypes: 29, Antioch, Calif., July 2 and 16, 1954, G. A. Schaefers 

 (Berkeley and Townes). 9, Davis, Calif., May 8, 1955, J. C. Downey 

 (Davis). <? , Davis, Calif., May 12, 1955, R. D. Browning (Davis). 

 9, Fallen Leaf, Calif., July 28, 1915,. F. B. Herbert (Washington). 

 d\ Fort Seward, Calif., May 31, 1935, E. O. Essig (Townes). 9, 

 Snowline Camp, El Dorado Co., Calif., July 14, 1948, J. W. MacSwain 

 (Townes). 2c?, Sobre Vista, Sonoma Co., Calif., Apr. 31 and May 

 12, 1910, J. A. Kusche (San Francisco). 



This subspecies occurs in central and northern California. 



le. Xorides (Exomus) humeralis excomptus, new subspecies 



Black, the temple often stained with ferruginous. Flagellum of 

 female with a white band; palpi brown; tegula fulvous; hind margins 

 of pronotum fulvous; often hind half of pronotum ferruginous; front 

 and middle legs fulvous, the fifth segment of their tarsi black and the 

 first four segments of the male tarsi infuscate; hind leg black, its coxa 

 often partly fulvous (basally), its trochanters usually reddish brown, 



Figures 227-229. — Localities: 227 (left), Xorides humeralis sierrae; 228 (center) 

 X. h. excomptus; 229 (right), X. h. chiricensis. 



