Abstract
Summary Effective assessment of bee (Hymenoptera: Apoidea) diversity is essential for informed bee conservation policies. In this study, the effectiveness of Malaise traps in assessing bee species richness in a westcentral Illinois restored prairie was examined using the Chao1 nonparametric richness estimator. Individual traps varied greatly in abundance and species richness of bees collected, and substantially greater trapping effort would have been needed to achieve Chao1 estimates. Malaise traps provide a potentially effective means of augmenting bowl trap inventories, but more studies on Malaise trap performance and comparisons with bowl traps are needed, particularly in heterogeneous environments.
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