1983] 
Frolich & Parker — Eumegachile 
195 
Figure 1. Glass covered stick and glass tube with plastic insert used for nests. 
Figure 2. Schematic drawing showing construction of a partition. Whole leaf 
pieces are added in sequence (starting with No. 1) and are sealed to the nest wall, each 
subsequent piece partially covering the previous piece. 
Figure 3. Egg in late embryogenesis, attached to provision. 
Figure 4. Cocoon containing prepupal larva, showing incorporated fecal pellets. 
with a dissecting microscope fitted with fiber optics lighting (to 
reduce heat load). Larvae that died and examples of each instar 
were preserved in picroformalin. 
Results 
Within-Nest Biology 
Females began nesting in the greenhouse 4 June 1981, within 3 
days after release. The following is a composite account, in temporal 
sequence, from selection and preparation of a new nest to nest 
closure. Each activity discussed was observed for several different 
females. 
Nest Selection — Preparation. Before beginning cell construc- 
tion females investigated both types of potential nest substrates. 
Sticks and glass tubes that were not covered (darkened) in some way 
were either ignored or only casually inspected. Usually before pre- 
