March, 1913-] PROCEEDINGS OF THE SOCIETY. 75 



Mr. Engelhardt also exhibited a pink specimen of the same species, also 

 a male, collected in the salt marshes near Woodhaven, L. I. 



Mr. Grossbeck said that apparently the pink forms of katydid were unusu- 

 ally abundant this year, and placed on record three more, namely, one Ambly- 

 corypha rotundifolia, female, collected at Cedar Grove, Essex County, N. J., 

 August 2y, 1 91 2, by Bolton, a telephone report received at the Museum of 

 another, and a report of a third from Mr. Joseph Mattes. , 



Mr. Sleight showed his plan for keeping convenient reference copies of 

 descriptions. 



Dr. Osburn announced the programme for the next meeting and requested 

 members to write at least the scientific names of species cited verbally during 

 the meetings to facilitate accuracy of minutes. 



Meeting of October 15, 1912. 



A regular meeting of the New York Entomological Society was held Octo- 

 ber 15, 1912, in the American Museum of Natural History, at 8.15 P. M., Presi- 

 dent Dr. Raymond C. Osburn in the chair and seventeen members present. 



The President opened the symposium on insects of Aquatic Environment. 



Dr. Lutz read the introductory paper, which is not spread upon the min- 

 utes, as it, as well as the papers that follow, will be printed in full in the 

 Journal. 



Mr. Sleight read a paper on Trichoptera, showing the species referred to 

 in two boxes, one exhibiting the different stages for each species, the other 

 arranged to show graphically the relation between the speed of the current, the 

 character of t^j^ case made by the lanae and the abundance of each species. 



Mr. Barber read a paper on Water Hemiptera, in which the modifications 

 of structure and habits of the species were reviewed. 



Mr. Barber also mentioned the occurrence of bed bugs in hens' nests in 

 large numbers and stated that, though this has been known to occur before, 

 it was unusual. 



Mr. Grossbeck read a paper on mosquitoes, with special reference to envi- 

 ronment, in which he not only gave minute details for each species, but also 

 traced the reasons for their individual behavior in oviposition. 



Dr. Osburn read a paper on two groups of Diptera, aquatic to some extent 

 in the larval stage, the Tabanidae and the Syrphidse. 



At the conclusion of Dr. Osburn's remarks the vice-president, Mr. Chas. L. 

 Pollard, assumed the chair as Dr. Osburn was obliged to leave the meeting 

 to keep another engagement. 



Mr. Leng read a paper on " Aquatic Coleoptera," in which he referred to 

 the modifications of adults and larvae and the special environments under 

 which the species live. 



Mr. Davis exhibited his collection of aquatic plants, including those that 

 had been mentioned by previous speakers. 



Mr. Sherman read a paper on " Aquatic Dytiscidae," in which the results 

 of his extensive experience in collecting water beetles was summarized, and a 



