Vol. II 



November 19, 1921 



No. 19 



JOURNAL 



OP THB 



WASHINGTON ACADEMY 

 OF SCIENCES 



Robert B. Sosuan 



OBOPBTSICAi, LABOKATOKT 



BOARD OF EDITORS 

 S. F. Bi^KB 



BUKBAD OP PLANT OfDDSTBT 



SiDNBT PaIOB 



OBOLOOrCAi, SOBVBV 



ASSOCIATE EDITORS 



H. V. Harlan 



BOTANICAL SOCIETY 



N. HOLUSTBR 



BIOLOGICAL SOCIBTV 



S. A. ROHWBR 



BNTOMOLOGICAL SOCIBTV 



F. B. SiLSBBB 



PHILOSOPHICAL SOCIBTV 



G. W. Stosb 



OBOLOOICAL SOCIBTV 



J. R. SWANTON 



ANTBBOPOLOOICAL SOCIBTV 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY. AUGUST, AND SEPTEMBBR, WHEN MONTHLY 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OP PUBLICATION 



211 CHURCH STREET 



BASTON, PA. 



Entered a* Second Class Matter, January 25, I9I9, 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 on July 3, 1918. 



