NORTH OF MEXICO. 



293 



1 ee v i s . 

 difficilis. 



muricatus. 

 dilatatus. 

 puberulu s. 



productus. 



(1 u b i ii s . 



Epipleuroe and elytral fold roughly sculptured. 



Elytra costatc, with interstitial smooth granules. costatus 



Elytra with coarse erosions and elevated smooth patches, c r o s u s . 

 Elytra rounded on the sides, not margined. 



Epiplcura: narrow, suddenly dilated at base, elytra smooth. 

 Epiploime gradually dilated at base. 

 Body rounded, oval. 

 Body inflated, nearly globose. 

 Elytra not pubescent. 



Epipleuroe distinctly defined, nearly smooth. 

 Epipleune not distinctly defined, very densely punc 

 tulatc. 

 Elytra sparsely pubescent. 



Epi pleurae distinctly defined, nearly smooth. 

 Body elongate oval. 



Sab-opaque, elytra granulate. 



Shining, elytra smooth or faintly punctured. 



B. robustus, Leo., N. Spec., page 11.2. 



From the Island of San Clemente, on the coast of California. 



Length .70 inch. 



E. retioulatus, Lee, Ann. Lye. 5-132. 



Zopkosis reticulata, Say, Journ. Acad. 8, 250. 



Disoodemus retioulatus, Lee., Glass. Coll. N. A., p. 223. 



Not rare in Arizona and New Mexico. This species varies considerably in sculpture 

 and outline. The typical form is elongate oval ; many, however, are in my cabinet col- 

 lected by myself in Arizona, in which the; form is oboval, with the elytra somewhat in- 

 flated. In the inflated specimen the thorax is much narrowed in front, being scarcely 

 wider between the anterior angles than that between the hind angles. Specimens from 

 western Kansas or Colorado axe comparatively smooth, and the reticulations delicate; 

 those from Arizona are sub-costate, though never coarsely punctured and granulose, as in 

 the following species. Length .50-.62 inch. 



E. costatus, rounded, oval, convex, black, sub-opaque, thorax being finely and sparsely punctured on the disc, 

 densely but very faintly granulate on the sides, margin not thickened; elytra sub-costate, interstices coarsely punc- 

 tured, and with smooth, small, rounded tuhercles; indexed portion of elytra densely and coarsely punctured. Length 

 .00, breadth .40 inch. 



The humeral angle of the epipleura may be easily discovered from above, being 

 more prominent in this and the succeeding than in any other of our species. 

 Collected by Mr. Wm. M. Gabb on the peninsula of Lower California. 



AMEItr. lUlILOSO. SOC VOL. XIV. — "74 



