BULLETIN \4^^^^^_j^^ 



OF THE ^-a«LJIL^— ^ 



BROOKLYN ENTOMOLOGICAL SOCIETY 



Vol. X February, 1915 No. i 



CONTENTS 



THE SPECIES OF COSSONUS CLAIRV. OF AMERICA, Van 



Dyke i 



LEPIDOPTERA RECORDS 23 



SHORT STUDIES IN GEOMETRID^, No. 4, Pearsall, 24 



THE SPECIES OF COSSONUS CLAIRV. (COLEOPTERA) 

 OF AMERICA NORTH OF MEXICO. 



By Edwin C. Van Dyke, Berkeley, Cal. 



This paper is the outgrowth of an attempt to properly determine 

 the specimens in my own collection where I found that I not only 

 had a number of species apparently new, but that there was a 

 great misunderstanding with regard to many of our other species. 

 A very large series was at my disposal, for much of which I must 

 thank my numerous friends and correspondents. 



The species of the genus Cossonus are of some economic im- 

 portance, living as they do beneath the bark of dead trees and in 

 the outer sapwood, or occasionally, even in the heartwood itself, 

 and in dead shrubs. Most of them are confined to certain types 

 of trees, certain few to particular trees, and their distribution 

 usually follows the distribution of these trees. On the West 

 Coast, I have devoted some time to the working out of these 

 relationships and hence will add some notes concerning them. 

 With regard to the Eastern species, I can add but few biological 

 notes for most of those when given in lists are merely stated 

 to have been collected beneath the bark of dead trees. An 



