Proceedings. xi 



Gen. T. E. Wilcox called attention to a Cedar of Lebanon in 

 Lafayette Square. 



Three communications were presented : 



" Notes on the Importation of Foreign Birds "; T. S. Palmer. 



' ' Notes on the Breeding of Minks in Captivity ' ' ; Ned Dear- 

 born . 



'' Endamoeba gin givalis and Pyorrhea"; M. W. Lyon, Jr. 



April 3, 1915— 539th Meeting.* 



President Bartsch in the chair and 65 persons present. 



Dr. L. 0. Howard called attention to a curious wasp's nest. 



Doctors Bartsch and Lyon made remarks on the red-headed 

 woodpeckers in the grounds of Freedmen's Hospital. 



Dr. Bartsch and Mr. Vernon Bailey made remarks on the 

 gray squirrels in the city parks. 



Two communications were presented : 



"The Snakes and Lizards of Okefinoke Swamp"; A. H. 

 Wright. 



" The Birds of a Cat-tail Marsh " ; Arthur A. Allen. 



April 17, 1915— 540th Meeting.t 



Vice-President J.N. Rose in the chair and 50 persons present. 



Dr. L. 0. Howard discussed the novel breeding habits of 

 certain mosquitos in the mountains of New York. 



Three communications were presented : 



" Some Features in the Morphology of the Insect Order Thy- 

 sanoptera " ; J. D. Hood. 



"Biological Explorations in Eastern Panama"; E. A. 

 Goldman. 



" Notes on Variation, Distribution, and Habits of the Pocket 

 Gophers of the Genus Thomomys " ; Vernon Bailey. 



May 1, 1915— 541st Meeting.t 



Vice-President Rose in the chair and 26 persons present. 

 Dr. 0. P. Hay made remarks on a North American specimen 

 of the extinct mammalian genus Nothr other iwn. 



•Abstracts in Journ. Washington Acad. Sci., Vol. 5, pp. 371-373, May 19, 1915; and 

 in Science, N. S., Vol. 41, pp. 785-736, May 4, 1915. 



t Abstracts in Journ. Washington Acad. Sci., Vol. 5, pp. 409-410, June 4, 1915; and in 

 Science, N. S., Vol. 41, p. 877, June 11. 1915. 



t Abstracts in Journ. Washington Acad. Sci., Vol. 5. pp. 411-412, .lune 4, 1915; and in 

 Science, N. S., Vol. 41, p. 878, June 11, 1915. 



