Dec, 1912.] Proceedings of the Society. 301 



Atiditing Committee : C. F. Groth, Edward D. Harris, E. L. Dickerson. 



Field Committee : Geo. P. Engelhardt, John A. Grossbeck. 



Delegate to New York Academy of Science: E. B. Southwick. 



On motion the secretary cast the ballot for the nominations presented. 



Moved and carried that a vote of thanks be extended to the retiring 

 president, Mr. Leng. 



Under miscellaneous business Mr. Barber requested that the members pre- 

 sent more short notes for publication. 



Mr. Comstock reported the capture of Erebus odora at Hoboken. 



Moved by Mr. Dow that a committee of two be appointed to confer with a 

 similar committee from the Brooklyn Entomological Society to arrange for the 

 annual dinner. The president appointed Mr. Engelhardt and Dr. Lutz. 



Mr. Harvey Voss, of Paterson, was proposed for membership by Mr. 

 Grossbeck and on motion elected as member. 



Mr. Leng, the retiring president, presented an interesting paper on the 

 " Geographical Distribution of the Cicindelidre of the Eastern United States." 



Mr. Pollard gave some notes on the psychology of the " Baldfaced Hornet." 

 While camping in the Ramapo Mts., near Bear Swamp, last July, in company 

 with Mr. Sleight, Mr. Pollard said he had an opportunity to observe Vespa 

 mactilata capturing insects, and to experiment with it. The wasps were first 

 noticed capturing some collected noctuids which were lying on the table. This 

 insect would circle around the table and then dart directly down at a moth. 

 In some cases at least their vision was poor, as flies quite near them would 

 not be captured, while the wasps could be misled by dark spots of bits of mud 

 substituted for the insects. 



Other insects were tried and when found too heavy, the wasps would take 

 part at a time (as in the case of the butterfly Argynnis aphrodite), first the 

 wings and then the body. 



When pinned insects were tried on the wasps they would in like manner 

 take first one part and then another, cutting off the body close to the pin. 



A Lycosid spider and a hornet were placed together. They attacked each 

 other and the following morning the hornet was found to be dead. When a 

 hornet and bumble bee were placed together, however, no results were obtained. 



Mr. Davis stated that Mr. Sleight and he had made similar observations. 

 They had observed Vespa maculata dart at flies on the side of a tent but at 

 other times go very close to the flies without capturing them. He had also 

 observed them feeding on other Vespa. 



Dr. Lutz moved that a vote of thanks be extended to Mr. Schaeft'er for his 

 services as librarian. 



Dr. Osburn stated that only a single species of crayfish — -Cambarus bartoni 

 — had been noted heretofore from this locality, but recently in examining some 

 specimens collected for the aquarium from Prospect Park and Central Park 

 lakes it was noted that there was a different species, Cambarus limosus, and this 

 was found to be abundant. 



Ortmann in his paper on the crayfish states that it occurs in the Delaware, 



