xxxiii. '22] ENTOMOLOGICAL NEWS 275 



to avoid the use of this character except where it is easily 

 noted. 



As a result of the present study I have recognized eighteen 

 species, two east of the Rocky Mountains and the remainder 

 from the Pacific side of the divide. I am confident that there 

 are still others awaiting discovery, especially in the higher 

 altitudes of the Sierras. Comparison with a paratype has 

 convinced me that my species nitidus is synonymous with 

 e.vigitHS Mann, also that the description of the latter species 

 was rather incomplete. Since Horn's "Synopsis of the 

 Histeridae," 1873* there has been no attempt to tabulate the 

 species of this genus and as there were then but three known 

 species, I offer the following table as a help in future studies 

 of this genus. 



Hetaerius vandykei n. sp. 



Form oblong oval, ratio of extreme length to breadth as seven to five. 

 Color fulvo-ferruginous ; punctate and hairy on all parts of the body 

 except the prosternum ; punctures coarse, uniform and fairly close 

 together; hairs except where elsewhere noted fine, long, suberect and 

 fulvous. 



Head at vertex nearly flat, coarsely, evenly punctate and hairy ; 

 epistoma and labrum smooth, shining, impunctate ; front very shallowly 

 impressed. 



Prothorax less than twice as wide as long ; sides evenly rounded 

 from apex to transverse sulcus, which is rounded at bottom and rather 

 deeply impressed. Bulla punctate and hairy on the outer two-thirds 

 of its surface with stiff, inward curving, plumose hairs. These hairs 

 are coarser than the hairs of the discal area. Discal area coarsely, 

 evenly, punctured, each puncture with a long, suberect, soft yellow 

 hair ; punctures and hairs of this area extend further into the obliqu" 

 depression than in any other species I have examined. Lateral area 

 coarsely punctured and hairy ; hairs along the margin coarser and 

 castaneous in color. 



Elytra evenly, closely, punctate and hairy ; first dorsal stria extends 

 three-fourths the distance to apex, second not quite reaching apex. 



Pygidium and propygidium punctate and hairy, each puncture marked 

 by a slightly curved, fine, depressed line in the chitin ; punctures some- 

 what less closely together than on upper surface, hairs depressed. 



Prosternum of the depressed type ; carinae of the margined area 

 broadly convergent between the coxae, then diverging to one-half the 

 length of the prosternum, then suddenly convergent, becoming parallel 

 at tips, leaving the margined area open at its cephalic end. Prosternum 



*Proc. Am. Phil. Soc. XIII. 1873, p. 303. 



