4 
Psyche 
[March-June 
Figure 1. Typical sites for oviposition, Ululodes mexicana (1-a) and 
Ascaloptynx jurciger (1-b). 
Year-round financial support for my studies was for three years 
provided by the National Science Foundation, in the form of a 
Pre-Doctoral Fellowship (September, 1968 to September, 1971). A 
final fourth year of research was completed with the aid of a Rich- 
mond Fellowship (i97i-’72) offered through Harvard’s Department 
of Biology. Unusual expenses associated with travel to the field and 
with publication of this paper were generously advanced by the 
Committee on Evolutionary Biology, Harvard University (NSF 
Grant GB 2791 1, Reed Rollins, Harvard University, Principal 
Investigator) . 
III. Methods and Materials 
Eggs of both JJlulodes mexicana and Ascaloptynx jurciger were 
collected during August and September in the southeastern part of 
Arizona, within a 25-mile radius of the Southwestern Research 
Station of the American Museum of Natural History (SWRS). 
All egg-masses, 25 of Ululodes and 35 of Ascaloptynx , were taken 
on shrubs in the arroyos and canyons of the Chiricahua and Peloncillo 
Mountains, at elevations of 4700 to 5700 feet (1 500-1800 meters). 
Several egg-masses were left in situ and visited twice daily; others 
