Vol,. lo August 19, 1920 No. 14 



JOURNAL 



09 THE 



WASHINGTON ACADEMY 

 OF SCIENCES 



BOARD OF EDITORS 

 J. pRAMKi.nr Mbybx Robbxt B. Sosham S. F. Blaks 



BVWlMAV 09 aTAMOAKM OBOPBTHCAL LABOKATOKT BCRSAD OF PLANT DtDOSTRT 



ASSOCIATE EDITORS 



H. V. Haklam S. a. Rohwbr 



BOTAmCAI, BOCISTT •NTOMOIXMIICAI. BOCnTT 



N. HOLLISTBR P. B. SIL8BBB 



BIOLOGICAL SOGIBTT PHILOSOPnCAL •OCIBTT 



SiDNBY PAIGB J. R. SWANTON 



OBOLOOICAL ■OCIBTT AHTBBOPOLOOIGAL BOCIBTT 



PUBUSHBD SBMI-MOHTHLT 

 BZCBPT IN JXJUY, AUGUST, AMD SSPTBMBBR, WHBN MONTHLY 



BT THB 



WASHINGTON ACADEMY OF SCIENCES 



OMUCB O* PUBLICATION 



ail CHURCH STRBBT 



BA8TON, PA. 



Bntered aa Second ClaM Matter, January 25, 1919, at the poat-offie* at Baataa. Pa., asdar the 

 Act of Aagnat 24, 1912. Acceptance for mailing at special rate of poataf* proTidcd far in 

 Section 1103 Act of October 3. 1917. Anthoriaed on Jwly 3. 191t 



