420 CLAVICORNIA — HISTERIDAE. 



short, punctuation at base not reaching second dorsal 



stria; anterior tibiae with seven or eiglit teeth. L. 2 1. 



Common. S. acneus, Fab. 



II. Disc of thorax diffusely punctured ; impunctate 



space on basal half of elytra not sharply defined. 



Metallic-green, shiny. Third dorsal stria on elytra 



reaching middle ; humeral stria not joined to inner lateral 



stria. L. 2 1. Not common. S. virescens, Payk. 



H. Clypeus separated from forehead by a ridge. 



a. Elytra dull, closely punctured throughout, except at 

 shoulder, apical margin and an oval space on each 

 near scutellum. 



Black or bluish-black. Thorax with a transverse space 

 on basal part of disc impunctate ; striae on elytra feeble, 

 sutural one obsolete behind, joined at base by a curve 

 (which bounds the impunctate space) to second dorsal, 

 third dorsal reaching middle, humeral stria almost joined 

 to lateral one. L. 2 1. Not very common. 



>S^. quadristriatus, E. H. 



b. Elytra shiny, punctured only behind. 



I. Sides of thorax punctured. 



1, Fifth dorsal stria on elytra reaching only slightly 

 beyond middle ; anterior tibiae moderately di- 

 lated, with six teeth. 



Dark bronze-green, shiny. Forehead with two distinct 

 angular furrows ; thorax with a transverse space on basal 

 part of disc impunctate ; sutural stria on elytra entire, 

 united to second dorsal stria, third dorsal reaching middle, 

 humeral stria joined to inner lateral one, punctuation 

 extending fully to middle. L. 2 1. Common. 



S. rugifrons, Payk. 



2, Fifth dorsal stria on elytra reaching apex ; 



anterior tibiae strongly dilated, with four teeth. 



Similar to >S^. rugifrons, but shorter oval, less convex, 

 forehead with only one distinct furrow, and punctuation of 

 elytra not reaching middle. E. 1^ 1. Pare. 



S. mciallicus, Herbst. 



II, Sides of thorax not ])un('tured. 



Pitch-black, shiny. Thorax punctured only nlong pos- 



