Vol*. lo February 4, 1920 No. 3 



JOURNAL 



OF THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. Frankwn Meyer Robert B. Sosman Alexander Wbtmorb 



BOKBAD OP STANDARDS OBOPBYSICAL LABOKATOKY BIOLOGICAL SURVEY 



ASSOCIATE EDITORS 



H. V. HARI.AN S. A. ROHWER 



BOTANICAL SOCIBTY BNTOMOLOOICAL BOCIBYY 



N. HOLLISTER F. B. SiLSBEE 



BIOLOGICAL SOCIBTY PHILOSOPHICAL SOCIBTY 



Sidney Paige J. R- Swanton 



OSOLOOICAL SOCIBTY ANTBBOPOLOOIGAL SOCIBTY 



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 EXCEPT IN JULY, AUGUST, AND SEPTEMBER, WHEN MONTHLY 



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Entered as Second Class Matter, January 2S, 1919. at the post-office at Bastoa, Pa., undar the 

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

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