Vol. io May 4, 1920 No. 9 



JOURNAL 



OP THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. Franklin Mbybk Robebt B. Sosmak Alsxandsr Wbtmom 



■ OBSAO or BTAMOAaiW OBOrBTNCAL LABOBATOBT BIOLOOICAL BtTBVBT 



ASSOCIATE EDITORS 



H. V. HAKMJf S. A. ROHWBR 



BOTAMICAL aOCIBTT BHTOMOLOOICAI, BOCIBTT 



N. HOIXISTER F, B. SiLSBBB 



BIOLOGICAL BOCIBTT PHILOSOPHICAL SOCIBTT 



Sidney Paige J. R- Swanton 



OBOLOOICAL SOCIBTT ANTHBOPOLOOICAL BOCCBTT 



PUBLISHED SEMI-MONTHLY 

 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



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Batered at Second CUm Matter, January 25, 1919. at the poat-officc at Baatoo, Pa., umdm the 

 Act of Angtiat 24. 1912. Acceptance for mailioK at tpecUI rate of poaUge provided for ia 

 Section 1 103 Act of October 3, 1917. Anthorteed on Jnly 3. 1918 



