SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOLUME 68, NUMBER 2 



RECOGNITION AMONG INSECTS 



BY 



N. E. McINDOO, Ph. D. 



Insect Physiologist, Bureau of Entomology, U. S. Department of Agriculture 



(Publication 2443) 



CITY OF WASHINGTON 



PUBLISHED BY THE SMITHSONIAN INSTITUTION 



APRIL 30, 1917 



