144 ENTOMOLOGICAL SOCIETY 



Mr. Schwarz said, erroneously considered the fauna of the 

 Rocky Mountains as radically different from that of the Sierra 

 Nevada. The faunas of the Wasatch Mountains of Utah 

 a spur of the Rocky Mountain system and that of the Sierra 

 Nevada in the vicinity of Lake Tahoe, California, are remark 

 ably alike. There is in the U. S. National Museum a list of 

 Coleoptera collected by the late H. G. Hubbard on the Wasatch 

 Mountains, Utah, and another list of Coleoptera collected by 

 Mr. Hubbard in the same year at Lake Tahoe. A comparison 

 of these two lists would illustrate the affinities of the two 

 faunas. Doctor Hopkins then discussed the relation of bark- 

 beetles to the faunal regions of the eastern and western sec 

 tions of the Rocky Mountain and Pacific Coast areas and the 

 evident value of these insects in defining local divisions and 

 sections of these regions as distinguished from those defined 

 by their host plants. He contended that in determining faunal 

 regions one should study groups of insects rather than single 

 species. Mr. Schwarz said that it was necessary to have expe 

 rience to know what group to single out for study as aiding 

 in the determination of zoogeographical regions. As an in 

 stance he cited the carabid genus Nebria as admirably adapted 

 for illustrating geographical distribution, not only as between 

 the Boreal and Transition zones, but also as between the Rocky 

 Mountain system and the Sierra Nevada. 



Mr. Busck showed some colored illustrations of Walker's 

 types of Microlepidoptera prepared for the U. S. National 

 Museum by an artist in the British Museum. 



Doctor Howard mentioned a rather amusing incident in 

 connection with Mr. George Compere's efforts to introduce 

 parasites of the codling moth (Carpocapsa pomonella L.) into 

 California from Europe. When the parasites arrived at their 

 destination no codling moth larvae could be found to which to 

 transfer them, and larvae had to be shipped in cold storage 

 from New Zealand to California to meet the emergency. 



Mr. Knab stated that he had come to the conclusion that 

 the character of toothed or untoothed claws in adult mosquitoes 

 would not define generic limits, for he had discovered that this 

 character is subject to variation, sometimes even within the 

 same species. 



