284 
Psyche 
[September-December 
Figure 1. Distribution of Cremasiocheilus armatus based on field col- 
lections and museum specimens. 
terized by regions of high host ant density and the presence of a large 
population of armatus adults and immatures. Nest material was 
sorted, beetles were counted, and observations made on interactions 
with ants. All nest material was replaced to minimize the adverse 
impact of the sampling technique. The sex of the adult was identified 
in the field and later verified under a dissecting microscope. The 
sex was determined by evident geometrical differences of the last 
ventrite and the pygidium. 
Adults and larvae were kept in the laboratory for many months 
with and without host ants. Larvae were most successfully reared 
in containers filled with original ant nest material. Adults were 
kept in closed containers at below room temperatures during the 
winter and were fed ant larvae the following spring. 
