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Species Aporinellus taeniatus

Aporinellus taeniolatus - Aporinellus taeniatus - female Wasp of some sort? - Aporinellus taeniatus Wasp of some sort? - Aporinellus taeniatus Wasp of some sort? - Aporinellus taeniatus Wasp of some sort? - Aporinellus taeniatus Small Wasp - Aporinellus taeniatus - female Small Wasp - Aporinellus taeniatus - female Aporinellus? - Aporinellus taeniatus - female
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 Pompilini
Genus Aporinellus
Species taeniatus (Aporinellus taeniatus)
Synonyms and other taxonomic changes
Pompilus taeniatus Kohl, 1886
Pompilus taeniolatus Dalla Torre, 1897
Aporus ferrugineipes Viereck, 1906   [Orig. Description here]
Aporinellus rufus Banks, 1911   [Orig. Description here]
Aporinellus californicus Rohwer, 1917   [Orig. Description here]
Aporinellus banksi Bequaert, 1919   [Orig. Description on pg. 119 of PDF here]
Aporinellus semirufus Banks, 1929   [Orig. Description on pg. 326 of PDF here]
Aporinellus bequaerti Banks, 1933   [Orig. Description on pg. 3 of PDF here]
Identification
In all the currently existing keys, two principal characters are cited for separating taeniatus from all other species in the genus:
1) The 2nd submarginal cell is relatively small...less than twice as wide as high (cf. Fig. 245 here from (1)).2) The distal-most tarsal segments have a few minute spines on the underside (cf. Fig. 255 here from (1)) This character will not likely be visible in most BugGuide posts!
As might be expected from the large number of synonyms, Wasbauer & Kimsey(2)(1985) state that:
"Aporinellus taeniatus is a highly variable species, in both the color and extent of the patterns of appressed pubescence and also in integumental color. Females vary from entirely black to extensively banded with whitish or silvery pubescence, and the integumental color may be entirely black or partly to entirely red. Males are always black and are conspicuously banded."
And Evans(1951)(1) adds that: "...in some specimens the pubescence is almost entirely brownish."

Evan's detailed 1951 description of A. taeniatus taeniatus can be read starting on pg. 282 here. He described further varieties (which may, or may not, be currently recognized by various workers) on the pages that follow (pp. 284-288).
Range
Transcontinental U.S. and British Columbia to southern Costa Rica(2)
Food
From Wasbauer & Kimsey(2)(1985):
"Evans (1951) stated that adults of this species visit honeydew occasionally. We have taken both sexes at honeydew of Chaitophorus populicola on Populus trichocarpa in Mono County and females at honeydew from galls of Disholcaspis eldoradensis on Quercus lobata in Riverside County. Females have also been taken at extrafloral nectaries on the stems of Gossypium hirsutum and are known to visit flowers of the following: Eriogonum spp., Euphorbia sp., Melilotus albus and Prosopis juliflora. Males have been collected on flowers of Calochortus luteus, Euphorbia albomarginata and E. serpyllifolia. Both sexes have been taken at flowers of Atriplex semibaccata, Foeniculum vulgare and Karwinskia Humboldtiana."
"Kurczewski and Kurczewski (1973) provide the following prey records: Pellenes agilis (Banks), immature; P. borealis (Banks), immature; and P. viridipes (Hentz) (Salticidae). Another salticid, Habronattus calcaratus (Banks), is reported as prey by Evans (1951)."
Life Cycle
From Wasbauer & Kimsey(2)(1985):
"Kurczewski and Kurczewski (1973) describe the burrow of taeniatus as constructed in sand at about a 50° angle to the surface, 3 mm in diameter and 5.5 an long, terminating in an oval cell.
Print References
Kurczewski, F. E. and E. J. Kurczewski. (1973) Host records for some North American Pompilidae. Third Supplement. Tribe Pompilini. J. Kansas Entomol. Soc, 46:65-81.
Internet References
Curated images of A. taeniatus from the Univ. of British Colombia: dorsal; ventral; and lateral.
Works Cited
1.A taxomomic study of the Nearctic spider wasps belonging to the tribe Pompilini (Hymenoptera: Pompilidae) [Parts I-III]
Howard Ensign Evans. 1950. American Entomological Society.
2.California Spider Wasps of the Subfamily Pompilinae (Hymenoptera: Pompilidae)
Wasbauer, M. S. and L. S. Kimsey. 1985. Bulletin of the California Insect Survey, No. 26.