I70 Memoirs on the Coleoptera 



sides broadly rounded and sharply, subequally reflexed, converging and 

 straighter basally, the angles rather narrow, produced posteriorly and 

 evenly rounded; surface polished, finely and sparsely punctate, much 

 more coarsely but not densely laterally and basally, the foveae wanting, 

 the surface there being merely flat, the side margin basally rather more 

 strongly reflexed; median stria distinct, entire; elytra evenly oblong- 

 oval, two-fifths longer than wide, two-fifths wider than the prothorax, 

 the humeri gradually rounded; surface very shining, with series of 

 irregular oblong contiguous tegulse, which are but very slightly convex 

 and separated along their sides by fine, feeble and minutely punctate 

 lines, which do not produce the effect of continuous striae, the transverse 

 lines fine and feeble and bearing each a small subasperate puncture; 

 toward the sides the tegulse do not differ in form but become slightly 

 more convex; apically, they become subgranif or m; sides of the abdomen 

 toward base coarsely punctate, the short transverse met-episterna 

 sparsely and much less coarsely punctulate; anterior male tarsi narrowly 

 dilated, with coarse black lateral fringes. Length (cf) 15.0 mm.; 

 width 7.0 mm. Oregon (Klamath Co.), — Nunenmacher. 



This species is probably narrower than either monticola or 

 nevadensis, although the latter two are now represented only by 

 the rather stout females ; the sculpture of the elytra is very different, 

 there being no regular smooth striae as in those species, the fine 

 irregularly arcuate lines bordering the tegulse not forming striae 

 and having numerous very fine punctures. In the still more 

 aberrant diffractus, from New Mexico, the tegulae, which are 

 irregular and similarly fiat, are separated transversely by rather 

 deep short lines, but there is scarcely any trace whatever of longi- 

 tudinal' lines separating them, and the sides of the elytra basally 

 are coarsely serrate; there is no trace of this serration in either 

 monticola, nevadensis or klamathensis. I regret not knowing at 

 present typical examples of the species described by Say, from the 

 Arkansas Valley, as luxatus; it is evident that the Sierran species 

 are different, and there is scarcely any probability that diffractus 

 can be at all closely related. 



It is rather uncertain whether the following species should be 

 placed in Calosoma or Callisthenes, but most of its characters 

 harmonize better with the latter than with Calosoma: 



*Callisthenes laevissimus n. sp. — Oval, strongly convex, highly pol- 

 ished, the upper surface with scarcely a trace of sculpture, black, the 

 elytra broadly rufescent on the suture basally in only the male of the 

 two specimens at hand; under surface very smooth, deep black, the 

 abdomen with some coarse sparse punctures laterally; head small. 



