94 



SILPHIDvE. 



thorax deeply and rather difi'usely 

 punctured ; sutural stria, towards the 

 base, deep and strongly sinuate ; form 

 elongate and pai'allel-sided 

 b. Last joint of club of antennae dis- 

 tinctly narrower than the penulti- 

 mate ; sutural stria, towai'ds the base, 

 evanescent and almost straight, 

 a*. Form parallel-sided ; sides of 

 thorax slightly sinuate before pos- 

 terior angles, 

 at. Size larger ; thorax finely punc- 

 tured, only slightly more so than 

 elytra ...... 



b-f. Size smaller ; thorax strongly 

 punctured, much more so than 

 elytra ...... 



b*. Form fusiform ; sides of thorax 

 not sinuate, posterior angles bhmter 

 af. Outer border of anterior tibiae 

 straight, simply right angled at 

 apex ; thorax rathei- dull 

 bt. Outer border of anterior tibife 

 distinctly curved, ending in a small 

 projecting tooth or very acute 

 angle ; thorax shining . 

 B. Thorax very finely and not more 

 strongly punctured than elytra. 



a. Elytra more evenly rounded at the 

 sides, broader about the middle, with- 

 out traces of strise ; colour dark 

 brown. L. lf-2i mm. 



b. Elytra broadest near the base. 



a*. Size larger, length 2-24 mm. ; 

 colour generally dark brown ; elytra 

 with slight traces of strife 



b*. Size smaller, length H-14 mm. ; 

 colour testaceous or reddish-brown ; 

 elyti^a without traces of striae . 



0. RUFESCENS, Krcmtz^ 



0. DENTIPES, Sahib. 



0. MicROPS, Czwal. 

 C. ZEBEi, Kraatz. 



C. BRUNNEUM, Lotr. 



C, DENTICULATUM, Kraatz. 



0. APPENDICULATUM, 



Sahlh. 



C. CALCARATUM, Er. 



The above table does not differ very materially from the tables of 

 the species given in Vol. iii. pp. 66, 67, but sevei-al fresh characters are 

 noted, and it will probably be found of considerable service in identify- 

 ing the females of this very difficult genus. 



Dr. Joy gives the following table of the male ditterences, which are 

 in^some cases very striking {I.e. p. 26!,)). 



