Voi«. II April 19, 192 1 No, 8 



JOURNAL 



OF run 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 Robert B. Sosman S. F. Blakb Sidnby Paigb 



OSOPB¥SICAI. LABORATOBT BDRSAU OF PLANT INDOSTRT OBOLOOICAI, SDKVBV 



ASSOCIATE EDITORS 



H. V. Harlan F. B. Silsbbb 



BOTANICAL SOCIBTT PHILOSOPHICAI, SOCISTS 



N. HOLUSTSR G. W. Stosb 



BIOLOOICAL. SOCIBTY GBOLOOICAI, SOCIBTT 



S. A. ROHWER J- R- SWANTON 



BNTOMOLOGICAL SOCIBTT ANTHROPOLOOICAI, SOCIBTT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BV THB 



WASHINGTON ACADEMY OF SCIENCES 



OFFICE OF PUBLICATION 



211 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 on July 3, 1918. 



