BY THE REV. T. BLACKBURN. 143 



F. General puncturation more 

 or less coarse, and not 

 uniform over upper sur- 

 face 



G. Club of antennae black . . . nigellus, Er. 

 GG. CI ub of antenna3 yellow dicbms, Blackb. 

 FF. Puncturation fine and uni- 

 form (though not minute 

 and confluent as in punc- 

 tipennis, &c.) Size over 



5 lines constans, Blackb. 



EE. Prothorax more sparingly 



punctulate 



F. Prothorax only moderately 

 narrowed forward (base not 

 more than i again as wide 



as front) 



G. Middle lobe of "trilobed 

 outline " of head at least 

 half as wide as lateral 



lobes 



H. Lateral margins of cly- 



peus nearly straight electus, Blackb. 



HH. Lateral margins of 

 clypeus normally 



curved cygneus, Blackb. 



GG. Middle lobe of "tri- 

 lobed outline" of head 

 appearing evidently 

 less than half as wide 



as lateral lobes auricomuSj Blackb. 



FF. Prothorax more strongly 

 narrowed forward (base 

 more than i again as 

 wide as front) 



