x The Biological Society of Washington. 



November 4, 1911— 487th Meeting. 



The president in the chair and 74 persons present. 



W. P. Hay exhibited lantern slides of living Amphioxus and 

 of the blue crab, showing the egg masses of the latter. 



The program consisted of talks on Recent Explorations in 

 Panama. The results of the recent exploring expedition under 

 the auspices of the National Museum were presented by 

 S. E. Meek, E. A. Schwarz, E. A. Goldman and August Busck. 

 Numerous illustrations were used. 



November 18, 1911— 488th Meeting. 



The president in the chair and 56 persons present. 

 The following communications were presented: 

 "A Study of Distribution based upon the family Pyramidel- 

 lidae ": Paul Bartsch. 



'Peculiar Migration of the Evening Grosbeak": W. W . 

 Cooke. 



December 2, 1911— 489th Meeting. 



The [(resident in the chair and 49 persons present. 



General Wilcox noted having found numerous particles of 

 white quartz in the stomachs of the blue grouse. 



Barton W. Evermann reported the safe arrival in the United 

 States of ten young fur seals from the Pribilof Islands. 



L. 0. Howard reported that R. S. Woglum of the Bureau of 

 Entomology had returned from Asia, bringing six cases of 

 living parasites of the white fly, so destructive to citrus fruits 

 in Florida. 



The following communications were presented : 



"The Hooting of the Blue Grouse " : E. A. Preble. 



" Notes on the Fishes of the District of Columbia " : A. C. 

 Weed . 



' On another supposed Fruit-bearing Fern-like plant from 

 the American Permian " : David White. 



December 16, 1911 — 490th Meeting. 

 THIRTY-SECOND ANNUAL MEETING. 



President White in the chair and 32 persons present. 

 Reports of the secretaries, the treasurer, and chairmen of 

 standing committees were received and placed on file. 



