Vm MONTHLY PROCEEDINGS 



Journal of the Royal Microscopical Society, vol. ii, Nos. 4 — 7, 

 vol. iii, Nos. 1 and 2. From the Society. 



Annual Report of the Entomological Society of the Province of 

 Ontario for 1879. From the Society. 



The Chinch-Bug, by Cyrus Thomas, 1879. From the Author. 



On the Tenthredinidae and Uroceridiae of North America, by Norton 

 and Cresson, 1880. From the Authors. 



Descriptions of some new Tineina, with Notes on a few old species, 

 by V. T. Chambers. From the Author. 



May 14, 1880. 

 Director Dr. LeConte in the chair. 



After presenting for publication, in the Transactions of the American 

 Entomological Society, a paper on the Silphidae, Dr. Horn gave in brief 

 the objects and scope of the paper, and explained the reasons which 

 have induced him to adopt a diiferent arrangement of the family. 

 The desire of the author is to make known, in as much detail as 

 seemed necessary, the species known to inhabit our fauna, and in so 

 doins its scope has been extended so as to make such comparisons 

 between foreign genera and our own as might be necessary to place 

 both series in a clearer light. 



In the primary division of the family, it was found necessary to 

 discard all reference to the trochanters, the character as used being 

 very misleading and in fact useless. The structure of the coxal 

 cavities and the coxae afford the basis of the new arrangement pro- 

 posed, which enables all the genera which have been considered 

 aberrant to be placed in their true position. 



In order to demonstrate the new system, it was proposed to give 

 figures of all the genera with details, drawn in the greater part from 

 nature, and in few instances copied. These drawings were exhibited 

 to the members. 



The Publication Committee laid upon the table signatures 16 to 18 

 (pages 121 to 144) of volume viii, of the Transactions of the American 

 Entomological Society, printed since the last meeting. 



The following additions to the Library of the American Entomo- 

 logical Society were announced : — 



Proceedings of the Boston Society of Natural History, vol. xx, 

 Part 3. From the Society. 



Journal of the Cincinnati Society of Natural History, vol. iii. No. 1. 

 From the Society. 



