VOL. XX, PP. VII-XH JANUARY 31, 1908 



PROCEEDINGS 



OF THE 



BIOLOGICAL SOCIETY OF WASHINGTON 



PROCEEDINGS. 



The Society meets in the Assembly Hall of the Cosmos Club 

 on alternate Saturdays at 8 P. M. Brief notices of the meetings, 

 with abstracts of the papers, are published in Science. 



January 12, 1907 423d Meeting. 



The President in the chair and 40 persons present. 



W. R. Maxon exhibited a nest of horse hair apparently made 

 by a mouse. 



H. M. Smith, E. L. Morris and H. W. Clark noted unusually 

 late and early flowering of certain plants. 



H. M. Smith remarked upon the death of Captain Z. L. 

 Tanner, formerly commander of the steamer Albatross. 



H. E. Van Deman exhibited specimens of the Grimes Golden 

 apple. 



J. W. Titcomb exhibited a frog with two pairs of hind legs. 



The following communications were presented : 



M. B. Waite: A New Peach Blight from California. 



J. W. Titcomb: Some Work of the Beaver. 



Vernon Bailey: The Mountain Haymakers or Pikas. 







January 26, 1907 424th Meeting. 



The President in the chair and 26 persons present. 

 H. W. Clark offered some observations on Riccia. 

 The following communications were presented: 

 W. H. Dall: Notes on Cretaceous Volutidae . * 

 0. F. Cook: Parthenogensis and Alternation of Generation in 

 Parasitic Hymenoptera. 



* Smiths. Misc. Coll. (Quar. Issue) L, pt. 1, No. 1704, pp. 1-23, March, 1907. 



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