THE GENUS DENDEOCTONUS. 



pronotum; but the frontal groove and tubercles are usually more dis- 

 tinct, the head broader, and the mandibles stouter. 



In species 9 to 11 (subdivision B) the females have the declivity of 

 the elytra somewhat flattened and shining and the interspaces with 



HEAD 



Fig. 3. — The red turpentine beetle. Adult, lateral aspect, greatly enlarged: a, Pleural clavicula; 

 b, pregena. (Author's illustration.) 



small granules and sometimes punctured. In the males the declivity 

 is more convex, the interspaces have coarser granules, the head is 

 broader, and the mandibles are stouter. 



