BRITISH CISSID BEETLES. 85 



€. nitidus Herbst. Colour pale brown to black. Clubs of 

 antenna? always dark. Anterior angles of thorax 

 produced. 



C. jacquemarti Mell. Colour pale brown, to black. Clubs of 

 antennae always pale. Anterior angles of thorax not 

 produced. 



Group 2. — Form short. Plainly pubescent. L. 1J-2 mm. 



€. bilamellatus Wood or Fowler %—minutus Blackburn. Upper 



surface dull. Clubs of antenna? dark. 

 O. lineatosetosus, sp. n. Upper surface shiny. Clubs of antenna? 



pale. 



Group 3. — Oblong. Rather broad. L. 2-4 mm. 



O. boleti Scop. Thorax uneven, irregular impressions on disc, 

 base not bordered. Clubs of antenna? pale testaceous or 

 black. 



O. setiger Me\\. = 2nllosulus Marsh. Impressions on thorax more 

 or less obsolete, ba^e bordered. Clubs of antenna? pale 

 testaceous or black. 



C. miccms F. Never quite black. Clubs of antenna? always 

 dark. 



C. hispidus Payk. Mature specimens always black. Clubs of 



antenna? always pale red. 

 C. bideiitatus 01. Dull. Scanty pubescence. 



Group 4. — Elongate. Large. L. 2-L- 2| mm. 



C. alni Gyll. Shiny. Finely punctured. Very scantily pub- 

 escent. Clubs of antenna? pale or dark. Tibia? long and 

 slender. 



C. latifrons, sp. n. Not so shiny. Coarsely punctured. Dis- 

 tinctly pubescent. Head very broad. Clubs of antenna? 

 pale. Tibia? short and stout. 



O. punctulatus Gyll. Dull. More coarsely punctured and with 

 longer pubescence. Clubs of antenna? pale or dark. 



Group 5. — Elongate. Size smaller. L. 1— 2| mm. 



C. oblongus Mell. =pygmceus Marsh. Black. Legs red or partly 

 r red and black. Clubs of antenna? variable, pale or dark. 



Pubescence usually reddish, rarely yellow or white. 



Females sometimes much above average size of this 

 group. 



C. vestitus Mell. First ventral segment of abdomen of male 

 bearing a small umbilicate depression in the middle 

 (Newbery). Colour variable, but rarely black. Legs 

 ferruginous, never red or black and red. Clubs of 

 antenna? pale or black. Upper surface dull. 



