Information is presented on the previously unstudied digger wasp, Chlorion cyaneum (Dalhbom), obtained from 21 nests in central Texas. Nests were dug in partially shaded sandy soil and had 1–3 cells, each mass-provisioned with 1–9 Arenivaga bolliana (Saussure), (Blattaria: Polyphagidae). Prey were generally transported on the ground, grasped dorsum-up with the mandibles and forelegs. Wasps maintained both outer and inner nest closures when hunting. Arrangement of prey, degree of paralysis, and egg placement were similar to those reported for C. aerarium Patton. Cocoon structure is described for the first time for Chlorion. Comparisons of nesting behavior components with those reported for C. aerarium are presented and discussed.
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Vol. 77 • No. 4