Vol. io January 19, 1920 No. 2 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. Franbwn Meyer Robert B. Sosmam Ai^xandbr Wnrtiotat 



BCRBAD OP STANDARDS OSUPHyBICAL I.ABOKATOBT BIOLOGICAL 8DRVST 



ASSOCIATE EDITORS 



H. V. Harlan F. B. SasaSB 



BOTANICAL SOCIRTT PHILOSOPaiCAL SOCtSTT 



N. HOLUSTER S. A. RoHWBR 



BIOLOGICAL SOCIBTV 8NTOMOLOOICAL aOCISTT 



Sidney Paige J. R. Swanton 



OSOLOOICAL SOCIBTT AMTBROPOLOOICAL BOCISTV 



PUBLISHED SBMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



BV TBB 



WASHINGTON ACADEMY OF SCIENCES 



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an CHURCH STREET 



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P,titer«d u Second CIbn Matter, January 25, 1919. at the pott-office at Baaton. Pa., uodw the 

 Act of Auguat 24, 1912. Acceptance for mailing at ipedal rate of poatage proThled for ta 

 Section 1 103 Act of October 3. 1917. Aathorised on July 3. 1918 



