NORTH OF MEXICO. 291 



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

 thorax verj finely and sparselj and the elytron rather more coarselj and verj sparsely 

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

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

 California. Length .55-.60 inch. 



i puncticollis, Lee, Ann. Lye. V.. p. 131. 



Similar in form to the preceding and bearing the same relation to it that opaca do< s 

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

 ferruginous in color and rather -lender, and with -lender tarsi. It i- about one-half or 

 two-thirds the length of viatica. Specimens are nut rare along the valleys of the Sacra- 

 mento and San Joaquin rivers. 



1 .rn-tli .35 inch. 



chscholtzii, Manu., Rev. Zool. Bull. Mosc. 1843 .'7".. Lac. Genres, pi. 52, fig. ~> not 



figure . 



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

 The punctures are not setigerous. Abundant near San Fran isco. 

 Length .50— .55 inch. 



C. affinis, Lee., Aim. Lye. V.. 131. 



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

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

 elytra! punctures. They are. however, retained a- distinct until further collection- show 

 their complete identity. 



Length .50 inch. 



i subpubescens, Lee, Ann. Lye. V.. 131. 



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

 bent hair-, giving tie elytra a silken appearance. Two specimens of the species are in 

 the cabinet of Dr. Leconte, labelled Emrrn mist us rugosus, the name having been given b) 

 Col. Motschulsky while in this city. Length .'■)'> inch. 



I ai talis, Escta., Zool. AH 



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

 also subpubescent, the hair- 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 

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



differ from this only in having longer hair- intermixed with the short scale-like o 



Length . in inch. 



I ovalis, Lee., Ann. Lye. V.. 131. 



W .til this commenci - a small series of i< gularly oval spi i i< -. The sides are always 



AMERI. PB1LOSO. SOC. — VOL. XIV.— 75 



