Abstract
The study of solitary wasps and bees has recently been expanded through the use of trap nests consisting of bored stems or wooden sticks (Koerber and Mcdler 1958, Fye 1965). The bored units are commonly bundled and placed in a variety of environments to attract the foundress female as it searches for a suitable nesting niche. One difficulty encountered in studies of this nature is stratification of nesting activity. To detect and study the vertical activity of the wasps and bees, special techniques must be employed to elevate the trap nests to the various strata of the environment. This paper deals with 3 methods successfully employed in wasp predation studies at Black Sturgeon Lake, Ontario. The 1st 2 methods are semipermanent installations for continuing studies, and the 3rd is well adapted for temporary as well as extended use.
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