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Info
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assectator or kirbii

Gasteruptiid - Gasteruption - female Gasteruption - female Wasp - Gasteruption Gasteruption - female Wasp - Gasteruption - female Wasp - Gasteruption Ichneumon Sep 1 - Gasteruption Wasp - Gasteruption
Classification
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" (parasitoid Apocrita))
Superfamily Evanioidea (Aulacid, Ensign, and Gasteruptiid Wasps)
Family Gasteruptiidae (Carrot Wasps)
Genus Gasteruption
No Taxon assectator or kirbii
Identification
There are 3 spp. with a short ovipositor in NA:
G. amputatum (so. AZ & Mexico) females have ovipositor tip (the distal 1/10) white
G. kirbii and G. assectator (both coast to coast) have ovipositor entirely black and are hard to separate by pictures (no diagnostic color characters; the amount of orange on the metasoma varies in both)

G. kirbii: frons and lateral lobes of the mesonotum somewhat shiny, with dense, fine punctures; metatarsomere 2 about 2.2 times as long as wide in the male and about 1.6 in the female; antennomere 4 about 2.0 times as long as wide
G. assectator: frons and lateral lobes of the mesonotum matt and with fine indistinct scattered punctures; metatarsomere 2 about 3.7 as long as wide in the male and about 3.0 as long as wide in the female; antennomere 4 about 2.6 as long as wide.
[Sources: D.R. Smith, pers. comm. to H.P., 2.vii.2010; and (1)]
Works Cited
1.The Nearctic species of Gasteruptionidae (Hymenoptera)
Townes H. 1950. Proc. U.S. Nat. Mus. 100(3259): 85-145.