Volume 141 (whole Volume)

THE BIOTIC ASSOCIATIONS OF COCKROACHES

(WITH 37 PLATES)

BY LOUIS M. ROTH AND EDWIN R. WILLIS

Pioneering Research Division, United States Army Quartermaster Research and Engineering Center Natick, Mass.

(PUBLICATION 4422)

CITY OF WASHINGTON PUBLISHED BY THE SMITHSONIAN INSTITUTION DECEMBER 2, 1960

SMITHSONIAN MISCELLANEOUS COLLECTIONS