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Genus Aporus

Aporus wasp - Aporus Green/black Wasp - Aporus luxus Spider Wasp - Aporus hirsutus Blue wasp - Aporus Hunting Aporus sp. - Aporus hirsutus - female Bluish Black Wasp - Aporus Aporus hirsutus with Aptostichus simus - Aporus hirsutus - female Spider wasp? - Aporus hirsutus
Classification
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 Pompilinae
Tribe Aporini
Genus Aporus
Numbers
Seven species (A. calcaratus, A. concolor, A. luxus, A. niger, A. notabilis, A. feralis, A. hirsutus.
A. hirsutus is in the subgenus Plectraporus, the rest are in the subgenus Aporus.
Size
Typically 8-15 mm, although males may be slightly smaller and females slightly larger than the figures given here; females>males.
Identification
This genus belongs to the subfamily Pompilinae, tribe Aporini and is identified by the following characters:
Spines at apex of hind tibia of unequal length and spacing.
Hind tibia always smooth in nearctic species.
Dorsal side of hind femur with at least a few spine pits.
Pocket in the basioposterior corner of the third discal cell.
Labrum at least partially concealed.
Females of this genus lack a tarsal comb.
Only two submarginal cells in the anterior wing.
Pronotal collar not depressed and on the same plane as the thoracic dorsum.
Pronotum very long, usually much longer than mesonotum, its posterior edge straight.
All species and both sexes are black, some have a fine pubescence that reflects bluish or greenish.
Range
Transcontinental as a genus, but only two have been recorded east of the Mississippi River and one (A. calcaratus) is restricted to southern Florida. A. niger is relatively safely identified in most of the east.
Habitat
Varied, from deserts to deciduous forests.
Season
Varied, depending on species and range. Aporus niger is in flight in the east from mid-June through September.
Food
Adults occasionally visit flowers. Spider prey is unknown for all but one species, but in those that are known the prey are Cyraucheniid spiders. However, A. niger is found in places where Cyrtaucheniids are absent, so it is possible that they feed facultatively on other spider species. Their prothoracic structure is modified for feeding on burrowing spiders and they likely prey on cyraucheniids where present.
Life Cycle
Apparently does not use its own burrow, but enters the burrow of a Cyrtaucheniid spider, paralyzes it, and then lays an egg. In southern states there can two generations per year, in the north there is apparently only one.
Print References
Bradley, J.C. 1944. A preliminary revision of the pompilinae (exclusive of the pompilini) of the Americas. Trans. Amer. Entomol. Soc., 70:23-157 (most descriptions and keys still are valid/work).

Krombein, K.V. 1979. Pompilidae, pp. 1543-1544. 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. (species, distribution, references)

Evans, H.E. 1966. A revision of the Mexican and Central American spider wasps of the subfamily pompilinae. Mem. Amer. Entomol. Soc., 20: 1-439. (more current descriptions can be found for most western species, keys)