'"'°°^"'] CANADIAN FOSSIL INSECTS. 69 



Coelambus derelictus. Orchestes avus. 



" cribrarius. Centrinus disjunctus. 



" infernalis. Scolttidae (1 sp.) 



disjectus. Phloeoainus squalidens (borings.) 



The comparison of this assemblage of forms with their recent allies 

 brings one to the same conclusions as were reached* by the study of those 

 first obtained. All come from the same horizon and several are found in 

 more than one locality, but none of the elytra from the Don Valley, 

 where the other remains indicate a warmer climate than the present, were 

 determinable. The Coleoptera from this Scarborough horizon indicate a 

 climate closely resembling that of Ontario to-day, or perhaps a slightly 

 colder one, a considerable proportion of their present allies being known 

 from a more northern habitat. Nevertheless a few of the species be- 

 longing to the present additions to the fauna find their apparently nearest 

 allies in southern forms ; these are, however, so few as to suggest the 

 probability of a mistaken reference in these cases. One cannot fail, also, 

 to notice that a large number of the allies of the interglacial forms are 

 recorded from the Pacific coast. Taking the case as it stands, I can only 

 repeat as a final conclusion what I said before, that on the whole, the 

 fauna has a boreal aspect, though by no means so decidedly boreal as one 

 would anticipate under the circumstances. 



The Scolytid borings, the last species of the list, were recently placed 

 in the hands of Dr. A. P. Hopkins, of Morgantown, W. Va., who is more 

 conversant with American Scolytidae and their work than any other of 

 our naturalists, and he has given me the results of his examination of 

 them, which appear as an Appendix to this paper, illustrated by two 

 plates drawn or photographed by him. He gives a closer determination 

 of the affinities of the insect which made the borings than I could do, as 

 I was unable to make a definite generic reference. 



In conclusion, I must express my indebtedness to Mr. Samuel Henshaw 

 of Cambridge, who has kindly given me the statistics of the distribution 

 of the existing beetles with which I have compared the fossils, and through 

 whom I have had access to the LeConte collection of Coleoptera in the 

 Museum of Comparative Zoology for purposes of comparison, — an invalu- 

 able opportunity ; and to Professor J. W. Folsom of Antioch College, 

 who, when living in Cambridge, made for me a preliminary comparison of 

 most of the fossils with the same extensive museum series at great pains 

 and expense of time and with much enthusiasm, thus greatly lightening 

 my final work ; I am glad to be able to add that his determinations in 

 nearly all cases agreed very closely with my own, and rendered the accu- 

 racy of what may be regarded as in some sense our joint work more 

 probable. 



* See p. 28 of the present volume. 

 Sc-lJ 



