oOO BKACilELYTKA — STENIDAK. 



h 1. Pubescence short and close lying. 



A 2, Thorax with an impression 

 before and another behind middle 

 on each side of central furrow; 

 coxae black. 



a 2. Knees yellow. 



Black, with greenisli-bronze lustre; antennae slender, 

 yellow, brownish at apex ; legs yellow, knees not darker. 

 Frontal furrows broad and rather deep. Thorax rather 

 longer than broad. L. 2 1. Common. S. impressus,Genn. 



b 2. Knees black. 



Black, with very feeble bronze reflection, very scantily 

 pubescent ; antennae and palpi red-yellow, first joint of 

 former darker ; legs red-yellow, posterior knees distinctly 

 black. Head half as long again as thorax, strongly punc- 

 tured, witli frontal furrows wide, vertex impunctate ; thorax 

 slightly longer than broad, tolerably closely, unequally 

 punctured ; elytra a third-part longer than thorax, toler- 

 ably closely and strongly punctured, with three indis- 

 tinct impressions ; abdomen widely margined, |)unctured 

 strongly at base and finely at apex. L. 2 1. Moderately 

 common. S. annulatus, Crotch. 



2? 2. Thorax with an indistinct oblique 

 depression on each side of abbreviated 

 central furrow; coxae reddish-yellow. 



Black, rather shiny ; antennae and legs reddish-yellow, 

 club of former brownish. Frontal furrows broad and rather 

 deep. Thorax almost broader than long. L. If 1. Com- 

 mon. S. Erichsoni, Rye. 

 h h. Antennae entirely blackish-brown. 



Black, rather shiny ; palpi pitch-black, first joint and 

 base of second yellow ; legs red-brown, coxae black, apex 

 of femora and nearly whole of tibiae black-brown, tarsi 

 slender, third joint much longer than broad. Frontal fur- 

 rows deep ; thorax scarcely longer than broad. L. 1| — Ifl. 

 Not common. ^S'. fuscicornis, Er. 



B B, Thorax broadest in middle. 



a a. Abdomen very slightly bordered ; an- 

 tennae unicolorous yellow. 

 Black, rather shiny, cylindrical ; palpi and legs yellow. 



