206 SERIUCORNIA. [Ci. 



15. Elytra with larger and smaller punc- 

 tuivs, the larger being arranged in 

 rows towards base. 



a. Thorax with side margins broad . . C. MICANS, F. 



b. Thorax with side margins narrow . C. HISPIDUS, Payk. 

 C. Elytra uniformly and irregularly punc- 

 tured, with the punctures not arranged 



in rows towards base. 



a. Head and thorux in male without 



plates. 



a*. Elytra strongly punctured . . C. PCNCTULATUS, Qyll. 

 b*. Elytra comparatively finely or 



very finely punctured, 

 af- Posterior angles of thorax 



almost right angles . . . . C. PYGM.EUS, Marsh. 

 bf- Posterior angles of thorax 



rounded, 

 aj. Elytra more shiny, less 



closely punctured. 

 *. Form bronder and more 

 convex ; thorax less con- 



tracted in front . . . . C. FESTIVUS, Panz. 

 **. Form narrower and more 

 depressed : thorax more 

 contracted in front . . . C. VESTITTTS, Melt. 

 bj. Elytra duller, more closely 

 punctured C. FDSCATUS, Hell. 



b. Clypeus and anterior margin of 

 thorax each furnished in male with 



a broad oblong projecting plate . . C. BILAMELLATUS, Wood. 



C. boleti, Scop, (rugulosiis, Mcll.). The largest of our species ; 

 oblong, very convex, of a dark pitchy brown colour, but varying from 

 this to ferruginous, immature examples being sometimes quite light; 

 upper surface clothed with very fine, almost scale-like, greyish-yellow 

 pubescence ; thorax as broad as long, at least as broad as elytra, rather 

 strongly margined at sides, but without or with scarcely a trace of a 

 margin at base, sides slightly rounded, very finely and closely punctured, 

 disc uneven and with more or less distinct traces of a raised central line ; 

 elytra very finely and thickly and more or less rugosely punctured with 

 large coarse punctures, which are arranged in more or less irregular rows ; 

 antennae and legs ferruginous, the former with club sometimes darker. 

 L. 3-4 mm. 



Male with the forehead transversely impressed in middle, and the 

 clypeus emarginate at apex in middle, and furnished on each side with 

 a blunt tooth ; thorax slightly broader than elytra. 



Female with the forehead almost even, and the clypeus simple ; 

 thorax not broader than elytra. 



In boleti, especially Polypori, on the burk of rotten trees ; also in damp fungoid 

 wood ; generally distributed throughout the kingdom, and usually abundant. 



The Cis rugulosus of Mellio, which was introduced into our lists by 



