The reason for the taxon swap is explained in Kurczewski & Kurczewski (1987: 83): "The correct name for Aporinellus taeniatus Kohl is Aporinellus taeniolatus (Dalla Torre). A. taeniatus was renamed while in homonymy and the name stands even though homonymy no longer exists. A. taeniatus was a junior homonym while in Pompilus. (A. S. Menke, pers. comm., 1980)." (see https://doi.org/10.22543/0090-0222.1600)
Kurczewski, Frank E. & Kurczewski, Edmund J. (1987): Northern Distribution Records for Some Nearctic Pompilidae (Hymenoptera). The Great Lakes Entomologist, vol 20 (2) (連結)
@nfensler I have corrected this on Bugguide as well.