R. L. Meagher, Jr., J. H. Frank, Larra bicolor (Hymenoptera: Sphecidae: Larrinae) Collected in Pheromone- and Phenylacetaldehyde-Baited Traps, The Florida Entomologist, Vol. 81, No. 4 (Dec., 1998), pp. 555-556
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Meagher et al. (1998) studied this question.
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