SMITHSONIAN MISCELLANEOUS COLLECTIONS 

 VOLUME 141 (WHOLE VOLUME) 



THE B I OTIC 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 



