16 PSYCHE [February 



THE ENTOMOLOGICAL SOCIETY OF AMERICA. 



The third meeting of the Entomological Society of America was held at the 

 University of Chicago, December 30 and 31, 1907, in affiliation with the American 

 Association for the Advancement of Science, and other societies. About one hundred 

 were in attendance, coming from as widely remote localities as Maine and California, 

 Ottawa and Louisiana. 



On INIonday sessions were held for the reading of papers, the program of which 

 follows : 



Notes on the Geographical Affinities of the Isle Royale, Lake Superior. (An 

 outline of the relations of the Isle Royale fauna (beetle fauna) to that of Northern 

 North America. General remarks on the major faunal centers based on beetles.) 

 Charles C. Adams. 



Some problems in Nomenclature. (A brief discussion of the validity of names, 

 particularly those bestowed on insect galls and larvae.) Dr. E. P. Felt. 



Stereoscopic Photography Applied to Entomological Subjects. (Exhibition of 

 excellent stereoscopic effects brought about by an ingenious but simple apparatus.) 

 Professor F. L. Washburn. 



Life History and Habits of the Dimorph of Chaitophorus negundinis Thos. 

 (Previous knowledge of the dimorph. Comparison with a similar dimorph in 

 Europe. Life history; appearance in summer. Part played in the survival of 

 species, etc.) John J. Davis. 



Is Mutation a Factor in the Production of Vestigial Wings among Insects? 

 (A summary of some observations among insects belonging to various groups, where 

 the evolution of wingless or subapterous species can be traced within a genus or 

 small group.) Charles T. Brues. 

 * The Sense of Sight in Spiders. Dr. Alexander Petrunkevitch. 



External Wing-Buds in Larvae of Holometabolous Insects. (A discussion of 

 the general subject and recorded instances; and a report of an unrecorded instance.) 

 Dr. William A. Riley. 



Notes on the Nervous System of the Corydalis Larvae. A. G. Hammar. 



Notes on a Chalcid Infesting Apple Seeds. C. R. Crosby. 



The INIouthparts and Phylogeny of Siricidae. J. Chester Bradley. 



On Certain Structural Characters of the Genus Catocala. W. Beutenmiiller. 



Is Vespa horealis an Inquiline? (An account of finding males and females of 

 Vespa horealis living in the nest of V. diaboUca on several occasions, apparently on 

 perfectly friendly terms.) Dr. James Fletcher. 



