X Proceedings of the Biological Society of Washington. 



February 12, 1916— 550th Meeting.* 



President Hay in the chair and 50 persons present. 



Dr. L. O. Howard called attention to the work done by Dr. 

 W. V. King in demonstrating that Anopheles punctipennis was a 

 carrier of both tertian and estivo-autumnal malaria parasites 

 and exhibited lantern slides of this mosquito and photomicro- 

 graphs of the stages of the malaria organism in this species of 

 mosquito. 



W. L. McAtee gave recent observations on the vegetation in 

 Virginia south of Washington. 



The regular program consisted of two communications, as 

 follows : 



*' Nepigon " ; Henry Talbott. 



' 'Game and Other Mammals of the Yellowstone Park Region" ; 

 Vernon Bailey. 



February 26, 1916— 551st Meeting. t 



President Hay in the chair and 50 persons present. 



The regular program consisted of two communications, as 

 follows : 



"An Early Seventeenth Century Mammalogist "; D. E. Lantz. 



"A Talk on the Extinct Animal Life of North America " ; 

 J. W. Gidley. 



March 11, 1916— 552d Meeting.^ 



President Hay in the chair and 28 persons present. 



Dr. R. W. Shufeldt exhibited lantern slide views of aquatic 

 and terrestrial vertebrates of the District of Columbia and 

 vicinity. 



Mr. Wm. Palmer exhibited the bones of a hitherto unknown 

 cetacean . 



The regular program consisted of two communications, as 

 follows : 



" Hemolysis and Complement Fixation " ; M. W. Lyon, Jr. 



"A Study of Malarial Mosquitoes in their Relation to Agri- 

 culture " ; D. L. Van Dine. 



•Abstracts in Journ. Washington Acad. Sci., Vol. 6, p. 160, March 19, 1916; and in 

 Science, N. S., Vol. 43. p. 438. March 24, 1916. 



t Abstracts in Science, N. S., Vol. 43, p. 474, March 31. 1916; and in Journ. Washing- 

 ton Acad. Sci., Vol. 6, p. 228, April 19, 1916. 



X Abstracts in Science, N. S., Vol. 43, pp. 581-582, April 21, 1916; and in Journ. Wash- 

 ington Acad. Sci., Vol. 6, pp. 256-258, May 4, 1916. 



