90 
Psyche 
[March 
These observations tend to support present taxonomic placement 
of these genera, but no simple relationship can be demonstrated be- 
tween any of the genera. 
ACKNOWLEDGEMENTS 
The work on Epopostruma and part of that on Orectognathus is 
part of a thesis submitted as partial fulfillment of the requirements 
for the M. Sc. degree, University of Melbourne, and was supported 
by grants from the C. S. I. R. O. and the University of Melbourne. 
The work on Colobostruma and part of that on Orectognathus is 
part of a thesis partially fulfilling the requirements for the Ph.D. 
degree, Cornell University, and was supported by an Allied Chem- 
ical Foundation Grant, and U. S. N. S. F. grant GB5574X, W. L. 
Brown, Jr., principal investigator. The work was carried out in 
the Genetics Department, University of Melbourne, and the En- 
tomology Department, Cornell University. I thank Professors M. 
J. D. White and W. L. Brown for much encouragement and help- 
ful advice. 
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