xii Proceedings of the Biological Society of Washington. 



use in perfumery; R. M. Anderson, Recent zoological explora- 

 tion in the Western Arctic. 



April 19, 1919— 596th Meeting. 1 



Vice-President Hollister presided; 43 persons present. 



New member elected: H. H. Lane. 



Informal communications: W. P. Taylor, Note upon the organi- 

 zation of the American Society of Mammalogists; T. S. Palmer, 

 Note upon ornithological activities in Germany during the war; 

 L. O. Howard, Note upon the introduction of an American wasp, 

 the horse guard, into Algeria; A. S. Hitchcock, Note upon the 

 representation of biology in the National Council of Research. 



Formal communications: Walter P. Taylor, Notes upon Dr. 

 J. G. Cooper's scientific investigations on the Pacific Coast; 

 G. W. Field, Observations on the Heath Hen, with lantern slide 

 illustrations; Albert Mann, Woods Hole Diatoms, with lantern 

 slide illustrations. 



May 3, 1919— 597th Meeting. 2 



Vice-President Bailey presided; 30 persons present. 



Informal communications: Alexander Wetmore, Note on the 

 feeding of Purple Finches on plant galls; L. O. Howard, Note 

 on the expected arrival of the seventeen-year cicada; Edith R. 

 Keleher, William Palmer, and Alexander Wetmore gave notes 

 upon the chimney-building habits of the cicada nymph; R. W. 

 Shufeldt, Note and exhibition, a second double-headed tortoise 

 and double-headed snake; E. W. Nelson, Note upon a double- 

 headed snake. 



Formal communications: Alexander Wetmore, Notes on the 

 Brown Pelican, as observed on Pelican Island, Florida, illus- 

 trated with lantern slides; Vernon Bailey, The explorations of 

 Maximilian, Prince of Wied, on the upper Missouri in 1833. 



May 17, 1919— 598th Meeting, 3 



President Smith presided ; 45 persons present. 



Informal communications: W. R. Maxon, Exhibition and re- 

 marks on a fungus of the genus Mitromyces; W. R. Maxon, Query, 

 Do both sexes of birds sing? Reply by H. C. Oberholser and 



i Abstract in Journ. Washington Acad. Sci., vol. 9, pp. 419, 420, August 19, 1919. 

 2Abstract in Journ. Washington Acad. Sci., vol. 9, pp. 418, 419, August 19, 1919. 

 SAbstract in Journ. Washington Acad. Sci., vol. 9, p. 420, August 19, 1919. 



