Stenodynerus pulvinatus

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Identification Atlas of the Vespidae (Hymenoptera, Aculeata) of the northeastern Nearctic region

CJAI 05, February 19, 2008
doi: 10.3752/cjai.2008.05

Matthias Buck, Stephen A. Marshall, and David K.B. Cheung

Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1

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63. Stenodynerus pulvinatus Bohart, 1953

Figs B7.2, 9, 10, 12, 14, 58; C63.1–4.

Species recognition. This is one of three Stenodynerus with an eyelid-like swelling behind the mid ocellus. It can be separated from the other two species, S. blepharus and S. oculeus, by characters provided in the key.

Variation. Fore wing length 5.5–7.0 mm (♂♂), 7.0–8.0 mm (♀♀). Variation otherwise not studied.

Distribution. Not recorded from Canada. Eastern U.S.: MA south to FL, west to MI and KS (Krombein 1979). The reddish Floridian form was named ssp. surrufus Krombein, 1959.

Biology. The biology of the nominate subspecies has not been studied. Subspecies surrufus nests in borings in wood and makes closing plugs and nest partitions from firmly agglutinated sand. Caterpillars of Gelechiidae, Tortricidae (Olethreutinae) and Pyralidae (Phycitinae) serve as prey (Krombein 1967, 1979).

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