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The female Aha evansi Menke, 1977 (Hymenoptera: Sphecidae, Larrinae)

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Aha-comprising two species endemic to Australia-was previously known from male specimens only. The female A. evensi Menke, 1977 is described here for the first time. The single specimen available originated from very near to the type-locality of the species. The female has the general habitus of Lyroda. -The following autapomorphic traits characterize the genus: 1) Dimorphic claws in both sexes (the outer claw is much enlarged while the inner claw is atrophied); 2) labiomaxillary complex compressed; 3) loss of vol sellar sclerite; 4) loss of aedeagal teeth; 5) pronotal collar with a strong median sulcus; 6) Media of fore wing diverges from M + Cu proximally to cu-a. The possesion of the following characters includes Aha in the Larrini: 1) Second submarginal cell receives both recurrent veins; 2) propodeal synsclerite elongate; 3) posterior propodeal face transversely carinate; 4) lateral ocelli deformed.

Affiliations: 1: O. C. Lomholdt, Zool. Mus., Universitetsparken 15, DK-2100 Copenhagen, Denmark


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