NORTH OF MEXICO. 



297 



case the thorax is wider at base than the elytra. The surface is smooth and shining, 

 thorax very finely and sparsely and the elytron rather more coarsely and very sparsely 

 punctured. The legs are always black. The under surface of the anterior tibia is densely 

 spinose, the spines being rather more evident than in any other species. Maritime 

 California. Length .55-.60 inch. 



C. punctioollis, Leo., Aim. Lye. V., p. 131. 



Similar in form to the preceding and bearing the same relation to it that opaca does 

 to robusta. The thorax is very densely and finely punctured. The legs are brownish or 

 ferruginous in color and rather slender, and with slender tarsi. It is about one-half or 

 two-thirds the length of viatica. Specimens are not rare along the valleys of the Sacra- 

 mento and San Joaquin rivers. 



Length .35 inch. 



C. esohsoholtzii, Mann., Rev. Zool. 1840-138. .Bull. Moso. 1848-S75. Lac. Genres, pi. 52, fig. 5 (not a good 

 figure) . 



The punctures of the elytra are very large and rather dense, the interspaces convex 



The punctures are not sctigerous. Abundant near San Francisco. 

 Length .50-55 inch. 



C. afflnis, Leo., Ami. Lye. V., LSI. 



It is doubtful whether the characters separating this from the preceding arc sufficient. 

 I am unable to see any other difference than the presence of short scale-like hairs in the 

 elytral punctures. They are, however, retained as distinct until farther collections sIioav 

 their complete identity. 



Length .50 inch. 



C. subpubesoens, Lee., Aim. Lye. V., nil. 



Differs from all our other species in being rather sparsely clothed with short recum- 

 bent hairs, giving the elytra a silken appearance. Two specimens of the species are in 

 the; cabinet of Dr. Leconte, labelled Emmenastus rugosus, the name having been given by 

 Col. Motschulsky while in this city. Length .37 inch. 



C. n cm oralis, Esch., Zool. Atl. 3-7. 



This and the preceding are much, more depressed than any other of our species. It is 

 also subpubescent, the hairs being very short and scale-like, and almost completely buried 

 within the punctures. The elytra are not rugose, however, in the same manner as in 

 eschscholizii, but are irregularly corrugated and coarsely punctured, The preceding spe- 

 cies differ from this only in having longer hairs intermixed with the short scale-like ones. 



Length .40 inch. 



0. ova, lis, Lee., Ann. Lye. V., 131. 



"With this commences a small series of regularly oval species. The sides are always 



AMKltl. PIIILOSO. SOC. — VOL. XIV. — If) 



