BY THOMAS G. SLOANE. 365 



k. Head with a longitudinal 

 supraorbital sulcus behind 



each eye C. planipenne Group. 



kk. Head not longitudinally 

 impressed on each side of 



occiput behind eyes C. marginatum Group. 



J J. Elytra quadripunctate C. anthracinum Group. 



II. Penultimate joint of labial palpi short, thick, 

 swollen. Suborbital antennal scrobes divided 

 longitudinally in middle by an oblique ridge. 

 Inflexed margin of elytra narrow behind first 

 ventral segment. 

 L. Inflexed margin of elytra becoming gradually 



narrowed to apex. (Elytra quadripunctate) C. bonellii Group. 

 LL. Inflexed margin of elytra very narrow 

 behind first ventral segment. (Facies 

 elongate.) 

 m. Elytra quadripunctate. 



n. Frontal sulci hardly diverging back- 

 wards C. scaritioides Group. 



nn. Frontal sulci deep and diverging 



strongly backwards C. 4-punctatum Group. 



mm. Elytra bipunctate on apical third C. subplauatum Group. 



The following is a list of species of the genus Carenum arranged 

 in groups according to the table given above. In my list of seven 

 years ago a number of species that were unknown to me in nature 

 were placed in wrong groups: therefore, in order that any such 

 errors in the present list may cause as little confusion and trouble 

 as possible, I have printed the names of all species definitely 

 known to me in Roman letters, and have used italics for those 

 species that are not at present known to me in nature. I now- 

 only assume responsibility for the accuracy of position of those 

 species printed in Roman letters, though I have endeavoured to 

 place the others in their proper places as far as descriptions will 

 allow.* Species of which the position seems doubtful are referred 

 to in notes after the list. 



* It may be noted that although I may know a species in nature, it 

 should not be assumed that I, in every case, recognise its validity as a species, 

 for I believe there is some synonymy yet to be dealt with, but it is a matter 

 only to be treated of when one's knowledge is sufficient. 



