94 RHYNCHOPHOEA — SCOLYTIDAE. 



Mentum elongate, gradually dilated in front, middle of 

 anterior margin slightly angular ; ligula commencing in 

 middle of mentum ; labial palpi short, first joint a little 

 longer than second ; funiculus of antennae with only its 

 first joint elongate ; first tarsal joint much shorter than 

 second, third not dilated, emarginate ; second abdominal 

 segment almost as long as next two together. 



Carpho'borus, Eich. 



JB S, Funiculus of antennae with six joints. 



Mentum scarcely longer than broad in front, base much 

 narrowed, front broadly rounded ; ligula commencing at 

 base of mentum ; first joint of labial palpi large, the other 

 two very small ; third tarsal joint not broader than second, 

 emarginate; intermediate abdominal segments equal, short. 



Hylurgus, Latr. 



C C Funiculus of antennae with seven joints. 



Mentum rather long, gradually slightly dilated in front, 

 middle of anterior margin somewhat angular ; ligula com- 

 mencing at base of mentum ; first joint of labial palpi 

 large, the other two very small ; third tarsal joint heart- 

 shaped or bilobed ; intermediate abdominal segments equal 

 short. Hylastes, Er. 



Scolytiis. 



A, Thorax diffusely and not strongly punctured. 



a. Male with prominences on tliird and fourth ventral 

 segments of abdomen. 



I, Elytra black. 



Black, shiny ; apex of femora narrowly, and of tibiae 

 broadly pitchy-red ; tarsi red-yellow. Forehead of male 

 closely covered with long erect hairs, that of female scantily 

 covered with long, depressed hairs, ridged ; thorax a little 

 longer than broad, coarsely and deeply punctured at sides 

 and front, finely and more diffusely on disc and behind ; 

 elytra parallel-sided, with strong punctured striae, inter- 

 stices flat, with a somewhat irregular row of very fine punc- 

 tures on each ; second ventral segment of abdomen nearly 

 vertical, very diffusely and rather indistinctly punctured, 

 fifth segment with a broad, deep impression, punctuation 

 coarser and slightly closer. L. 2^ 1. Not common ; in 

 Birch. S.Batzebitrgi, Jans. 



