THE GENUS DENDROCTONUS. 



9 



evidently much room for improvement in the line of uniformity in 

 names and interpretations. In the present paper the writer has 

 endeavored to adhere to the more generally accepted names proposed 



HEAD- 



FiG. 3.~Dendroctonus valens: Adult, lateral aspect, a, Pleural elavicula; 6, pregena. (Original.) 



by Audouin and other writers for the principal parts, and to suggest 

 only such revisions and new names as the immediate requirements of 

 clear definition in comparative anatomy and taxonomy appear to 

 demand. 



