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Genus Calopompilus

Wasp - Calopompilus maculipennis - female Spider Wasp - Calopompilus pyrrhomelas Calopompilus pyrrhomelas 01c - Calopompilus pyrrhomelas - male Wasp - Calopompilus fortis Wasp - Calopompilus pyrrhomelas Unidentified insect - Calopompilus pyrrhomelas Black wasp with orange-red spots on wing - Calopompilus maculipennis - female Wasp I think - Calopompilus pyrrhomelas - female
Kingdom Animalia (Animals)
Phylum Arthropoda (Arthropods)
Subphylum Hexapoda (Hexapods)
Class Insecta (Insects)
Order Hymenoptera (Ants, Bees, Wasps and Sawflies)
No Taxon (Aculeata - Ants, Bees and Stinging Wasps)
Superfamily Pompiloidea (Spider Wasps, Velvet Ants and allies)
Family Pompilidae (Spider Wasps)
Subfamily Pepsinae
Tribe Pepsini
Genus Calopompilus
Synonyms and other taxonomic changes
Chirodamus Haliday, 1837
Calopompilus Ashmead, 1900
See the comment here from Nick Fensler on 1 July, 2006.
8-25 mm, females>males.
Characters of the subfamily Pepsinae, tribe Pepsini: spines at apex of hind tibia of even spacing and length, transverse groove in second sternite, lacks pocket in basioposterior corner of third discal cell, serrate hind tibia in both sexes (usually less pronounced in males), labrum at least partially exposed, crease on side of first tergite, sides of first tergite in dorsal view straight or slightly convex.
Rather distinctive in the nearctic because of the following characters: rather short, stocky legs and antennae (second flagellar segment about 2.4X as long as wide, usually much longer in most other pepsines), short, flat clypeus and the brush of hairs on the inner side of the hind tibia is not interrupted or narrowed.
Transcontinental but individual species usually have much more restricted ranges.
Varied. Several species strictly inhabit woods.
Mid-to late summer to early autumn (mid-June through September/early October in eastern species). Most individuals that persist late into the year are females.
Adults occasionally visit flowers. Prey is known for only one species, C. pyrrhomelas (Antrodiaetus pacificus).
This genus is generally uncommon and rarely encountered. That is probably why so little is known about their biology. Prey and nesting behavior are not known for all but one species.
Print References
Townes(1), H.K. (1957). Nearctic wasps of the subfamilies pepsinae and ceropalinae. U.S. Nat. Mus. Bull. 209: 1-286. (descriptions, distribution, keys)
Krombein(2), K.V. (1979). Pompilidae, p. 1524 (as Chirodamus). In Krombein, K.V., P.D. Hurd, Jr., D.R. Smith, and B.D. Burks, eds. Catalog of Hymenoptera in America North of Mexico. Vol. 2 Apocrita (Aculeata). Smithsonian Inst. Press, Washington, D.C.
Works Cited
1.Nearctic Wasps of the Subfamilies Pepsinae and Ceropalinae
Henry K. Townes. 1957. Smithsonian Institute Press (Bulletin 209).
2.Catalog of Hymenoptera in America North of Mexico
Karl V. Krombein, Paul D. Hurd, Jr., David R. Smith, and B. D. Burks. 1979. Smithsonian Institution Press.