Vol. II 



November 4, 1921 



No. 18 



JOURNAL 



OF THB 



WASHINGTON ACADEMY 

 OF SCIENCES 



Robert B. Sosman 



OBOPBYSICAl, (.ABOSATOSV 



BOARD OF EDITORS 

 S. F. Blakb 



BDBBA0 OP PLANT OtDOSTKt 



Sidney Paiob 



OBOLOOICAL 80KVSV 



ASSOCIATE EDITORS 



H. V. Harlan 



BOTANICAI, SOCISTV 



N. HOLLISTBR 



BIOLOGICAL SOCiaTT 



S. A. ROHWBR 



8NTOMOLOOICAL SOCIBTT 



P. B. SlLSBSS 



PHILOSOPHICAL SOCISTV 



G. W. Stosb 



OBOLOOICAL SOCIETY 



J. R. SWANTON 



ANTaROPOLOOICAL SOCISTV 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY. AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



2 1 1 CHURCH STREET 



EASTON, PA. 



Entered as Second Class Matter, January 25, 1919, at the post-office at Easton, Pa., under the 



Act of August 24, 1912. Acceptance for mailing at special rate of postage provided for 



in Section 1103, Act of October 3, 1917. Authorized oa July 3, 1918. 



