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VOL. 20 



MAY 1918 



No. 5 



PROCEEDINGS 



OF THE 



ENTOMOLOGICAL SOCIETY 





OF WASHINGTON 



CONTENTS 



BARBER. H. G. THE GENUS PLINTHISUS LATR. (LYGAEIDAE-HEMIPTERA) 



IN THE UNITED STATES 1 ()s 



CUSHMAN, R. A. A CONVENIENT METHOD OF HANDLING LARGE NUMBERS 



OF INDIVIDUALS IN LIFE-HISTORY STUDIES OF INSECTS 112 



NELSON, JAS. A. AN EYELESS DRONE HONEYBEE 105 



PIERCE, W. DWIGHT MEDICAL ENTOMOLOGY A VITAL FACTOR IN THE 



PROSECUTION OF THE WAR . . 91 



PUBLISHED MONTHLY EXCEPT JULY, AUGUST AND SEPTEMBER 



BY THE SOCIETY 



OFFICE OF PUBLICATION 



2419-21 GREENMOUNT AVE. 



BALTIMORE, MD. 



EDITORIAL OFFICE, WASHINGTON, D. C. 



Entered as second-class matter February 28, 1913 at the post office at Baltimore, Maryland, 



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, 1818. 



