1972] 
Corn — Poliste$ carnifex 
157 
Rica. I am also very grateful to Drs. William and Mary Jane 
Eberhard for their hospitality during my stay in Colombia and for 
their valuable discussion and assistance in these observations. M. 
J. W. Eberhard dissected the queen from Colombia. Prof. O. W. 
Richards kindly identified the specimens of Polistes. This research 
has received partial support from NSF Grant No. GB27911 ; R. C. 
Rollins, Harvard University, principal investigator. Roger Swain, 
Robert Silberglied and Dr. H. E. Evans provided helpful comments 
on the manuscript. This paper is published with the aid of a grant 
from the Museum of Comparative Zoology at Harvard University. 
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