20 CIEUUEl'llACA — CAKABIDAE. 



Dark bronze. L. 11 — 13 1. Not common. 



C. clathratus, Lin. 



JD. Elytra with three longitudinal ribs, alternating with 



three rows of large grannies. 



Dark bronze or blackish ; posterior angles of thorax 

 scarcely produced ; elytra in the male slightly, in the 

 female distinctly sinuate before apex. L. 8 — 10 1. Com- 

 mon. C. (jranulatiis, Lin. 



-E". Elytra with three chains of granules, each interstice 

 having three raised lines. 



a. Sides of elytra slightly rounded. 



I, Thorax broader ; posterior angles moderately pro- 

 minent. 



Bronze or blackish above ; sides of thorax not at all or 

 only slightly, sinuate behind, side margin slightly raised, 

 more so behind than in front ; elytra not sinuate before 

 apex, central line in the interstices often higher than lateral 

 ones. Variable in size, colour, and sculpture of elytra. 

 L. 10 — 13 1. Tolerably common. C. monilis, Fab. 



II, Thorax narrower; posterior angles only slightly 

 prominent. 



Bronze-green, cop])ery, or Ijlackish ; sides of thorax 

 slightly sinuate behind, side margin only a little raised, 

 more so behind than in front ; elytra not sinuate l)efore 

 apex, striae between the raised lines finely punctured, cen- 

 tral line in the interstices often liigher than lateral ones. 

 L. 7 — 0. 1. Not unconnnon. G. arvensis, Herbst. 



h. Sides of elytra strongly rounded. 



Bluish-l)lack, with a violet margin to thorax and elytra ; 

 thorax considerably narrowed behind. L. 9 — 11 1. Com- 

 mon. C. catenulatii-s, Scop. 



I\ Elytra granulated or striate, without riljs or chains of 



large granules. 



<l. Granulation of elytra coarser ; body elongate. 



Black, with a violet margin to thorax and elytra; thorax 

 not mucli narro\\'ed behind ; elytra of female broader than 

 those of male, and scarcely sinuate before apex. L. 

 11 — 13 1. Common. C. violaceus, Lin. 



h. ( iranulation of elytra finer ; body oldong-ovate. 

 Black, with a sligliL bluish reilection; thorax somewhat 



