386 Dr. Malcolm Cameron on 



segment produced on either side into 

 a rather stout, slightly incurved spine, 

 the posterior margin between these 

 bisinuate ..... (72) bidens Cam. 



— Thorax distinctly punctured; ground- 



sculpture absent or very indistinct. 8. 



8. Elytra exceedingly finely and exceedingly 



sparingly punctured; middle of the 



disc of thorax impunctate . . (73) dubia Cam. 



— Elytra finely, but not exceedingly 



sparingly punctured; middle of the 



disc of thorax punctured. 9. 



9. Thorax finely and uniformly punctured. 



cj : dorsal segment with a flat, semi- 

 circular tubercle in front of the posterior 

 margin in the middle; 8th with a 

 small triangular excision on either side 

 of the middle of the posterior border, 

 so that a short, blunt, triangular process 

 is formed in the middle and the lateral 

 margins project as sharp triangular 

 teeth ...... (75) monJtoni Cam. 



— Thorax with vmequal, irregular punctures 



on the disc, the sides impunctate. 

 ^ : 8th dorsal segment with a short, 

 stout, blunt, slightly incui'ved tooth on 

 either side ..... (74) irregularis Cam. 



Sternotropa Cam. 

 1. Species black, the elytra often chestnut- 

 brown. (J : 8th dorsal segment with 

 a pointed tooth on either side, sepa- 

 rated by a nearly semi-circular 

 emargination . . . . • (77) nigra Cam. 



— Species black, the thorax, base and apex 



of the abdomen reddish-testaceous. (J : 

 suture of the elytra with a row of three 

 obsolete tubercles towards the posterior 

 part; 7th dorsal segment with a 

 minute tubercle on either side of the 

 middle line in front of the posterior 

 margin; 8th with a moderately long, 

 pointed, slightly incurved tooth on 

 either side ..... (78) ruficolUs Cam. 



