366 



Dr. Malcolm Cameron 



3. Head, thorax and elytra impunctate, 



densely coriaceous; species less 

 shining, (^ : 7th ventral segment 

 with a deep narrow excision on either 

 side, bounding a central quadrate lobe, 

 this furnished with a tubercle in the 

 middle and with the posterior border 

 a little produced and elevated in the 

 middle line; 6th ventral segment a 

 little produced in the middle and 

 truncate ..... bengal ensis Er. 



— Head, thorax and elytra distinctly 



punctured, thorax and elytra not 

 coriaceous; species more shining. 

 (J : characters of the preceding, but 

 with the posterior border of the 

 central lobe of the 7th segment broadly 

 emarginate on either side, and the 

 central produced point smaller and 

 sharper ...... nigriceps Kr. 



4. Species black or blackish with dark 



antennae at most, lighter at the base. 5. 



— Species in great part reddish- testaceous 



or ferruginous with reddish antennae. 8 . 



5. Head entirely shining, with large and 



distinct punctures posteriorly; thorax 

 shining, strongly rugose and strigose; 

 size larger (2-6 mm.) . . . exasperatus Kr. 



— Head impunctate, thorax stiigose, not 



rugose; size smaller (1-5-2 mm.). 6'. 



6. Sides of the head with a distinct i-aised 



line internal to the eyes, extending 

 from the base and continuous with the 

 frontal margin anteriorly; species 

 entirely opaque except the abdomen . latiusculns Kr. 



— Sides of the head without raised line 



internal to the eyes 7. 



7. Thoracic ridges and front of the head 



shining, the latter scarcely perceptibly 

 strigose; species somewhat shining. 

 (^ : 7th ventral segment with a small 

 tubercle on either side near the middle 

 and in front of the posterior margin; 

 6th ventral segment with a moderately 



