122 
Psyche 
[June 
Natural History Survey (W. E. LaBerge) ; University of Arkansas 
(E. P. Rouse) ; University of Missouri (W. R. Enns) ; and Los 
Angeles County Museum of Natural History (E. M. Fisher). R. 
M. Bohart kindly sent data from other collections examined by him, 
and H. E. Evans examined specimens of P. exclamans at the Amer- 
ican Museum of Natural History. I have personally obtained data 
from collections at Cornell University and the Museum of Compara- 
tive Zoology. 
This research was supported by NSF grant GB-336 to the Uni- 
versity of Michigan Museum of Zoology and a grant from the Com- 
mittee on Evolutionary Biology at Harvard University. 
Howard E. Evans, William G. Eberhard, Janice Matthews and 
Robert Matthews made helpful criticisms of the manuscript. Kath- 
leen Eickwort kindly made available the pre-publication manuscript 
of her paper on Polistes exclamans. 
References 
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