THE CANADIAN ENTOMOLOGIST. 129 



Raising \ivvx is by far the most instructive feature of Entomology, and 

 very interesting. Entirely too little attention is paid to it. We want the 

 whole life. How utterly ignorant we are, for instance, about the larvae 

 of Catocala ? Let all faulty females be confined, and they may lay im- 

 pregnated eggs ; try the young on willow, walnut or oak leaves. The 

 female is known by the heavy body tapering to a point ; the male ter- 

 minates in a pair of claspers. Some species are readily determined by 

 their antennae, the males being more broadly pectinated than the 

 females. 



The larvK of wood-boring beetles can be raised in tin or glass on wet 

 saw-dust (not pine) ; any mixed hardwood or poplar will do. I have 

 kept them so six and eight months, changing the saw-dust once a month. 

 But they are very tiresome, as one may have to keep them a year or two. 



ON A NEW SPECIES OF COSSUS. 



BY J. A. LINTNER, N. V. STATE MUSEUM NAT. HIST., ALBANY. 



Five years ago, I discovered at Center, in the trunks of poplar trees 

 (Popubis tremuloides ) several pupal cases of a Cossus, which, by their 

 differing from the other cases known to me, of C. Robinke and C. qiierci- 

 perda, I had reason to believe was an undescribed species. This year, on 

 the 14th of June, on examining some infested trees, several pupal cases 

 were discovered projecting half-way from the trunks, and an imago, which 

 had apparently just emerged, and was resting on the stump of a broken 

 limb. The colors of the moth so exactly simulated the surface on which 

 it rested that it was with difficulty observed, even when looking directly 

 at it. The moth, in all probability, is an undescribed species, for, from 

 the description given by Walker of a Cossus found at Hudson's Bay, and 

 named by him C. popdi, it must differ from that species. 



In recognition of the very large number of rare Lepidoptera which 

 the Center locality has yielded and still continues to give to persistent 

 exploration, I propose for it the name of Cossus Centerensis. 



