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For Insects, Spiders & Their Kin
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Subfamily Alysiinae

Wasp Wasp? - female Parasitoid of ragweed-mining agromyzid - female Hymenoptera - Braconidae? Braconid ex agromyzid ex Erigeron annuus Braconid Wasp - Trachionus Braconid ex Chirosia ex netted chain fern - Aphaereta - female braconid - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon ("Parasitica" (parasitic Apocrita))
Superfamily Ichneumonoidea (Braconids and Ichneumons)
Family Braconidae (Braconid Wasps)
Subfamily Alysiinae
Very large marginal cell is the hallmark for several genera in this subfamily.
The vertex of head has a unique shape.
An interesting feature of this subfamily is that the mandibular action is opposite to other wasps. To visualize, place the backs of your hands together and then move your fingers outward.

Comment from Joseph Fortier on the second of the above images: "What gives this braconid away as an alysiine is the last (closeup) shot, showing the truncated, outwardly curving mandible. Alysiine wing venation is often closely similar to that of Opiinae, another fly parasitoid. Alysiines use these specialized mandibles for digging out of the tough fly puparium after emergence from their own pupae."
Parasitoids of Diptera.
See Also
Compare mandibles of Opiinae: