1974] Evans , Matthews & Callan — Rubrica surinamensis 351 
Acknowledgments 
We are indebted to various specialists of the Systematic Ento- 
mology Laboratory, U.S. Department of Agriculture, for identifying 
the Diptera: R. Gagne, L. Knutson, C. W. Sabrosky, A. Stone, and 
W. W. Wirth. Dr. H. de Souza Lopes, of Rio de Janeiro, kindly 
identified the Raviniopsis spinosa. J. C. Bequaert identified some of 
the Trinidad Tabanidae, and the late R. C. Shannon made pre- 
liminary identifications of many of the Trinidad Diptera. The 
dragonfly (Odonata) was identified by D. C. Geijskes, the Hes- 
periidae by J. M. Burns. Evans and Matthews would like to ex- 
press their indebtedness to Drs. William and Mary Jane Eberhard, 
who served as their hosts in Colombia, and to Dr. A. Willink, who 
assisted in many ways during their research in Argentina. The 
wasps, prey, and associates collected during these studies have been 
deposited at the Museum of Comparative Zoology, Harvard Uni- 
versity. Evans and Matthews’ studies were supported by the Na- 
tional Science Foundation, U.S.A., grant GB 8746. 
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