Subject: Spider Wasp: Entypus unifasciatus
Geographic location of the bug: Oklahoma City, Oklahoma
Time: 06:23 PM EDT
Your letter to the bugman: Encountered this Spider wasp attempting to haul off his bounty today…wolf spider. A rather large wolf spider at that.
Respect for anything that takes care of these nasty spiders for me.
How you want your letter signed: Stefanie
Only female Spider Wasps hunt for prey to feed the brood. We agree your wasp is Entypus unifasciatus, and according to BugGuide: “Females dig a burrow that ends in a terminal chamber off of the side of a mammal burrow or large crack in the ground. The serrations on the hind tibiae are used to aid the movement of soil out of the burrow entrance. The position in which the egg is laid is unknown. Larvae feed on one large spider and, as in all Pompilids that have one generation per year, overwinter as pupae.”
Correction: January 23, 2018
In reference to the August 22, 2018 photo of Entypus unifasciatus from Oklahoma City, OK by “Stephanie,” the host spider is Syspira sp. (Prowling spider)(Miturgidae). Of 414 host records for this species of wasp, this is the first host record (1/414, 0.02%) for this family of spider. We do, however, have the same genus and family host record for the congener Entypus aratus from Mexico. We should like to acknowledge “What’s That Bug” and Stephanie for this extremely rare and highly unusual host record. Does Stephanie have a last name to accompany this record in our forthcoming publication on spider wasps? Thank you. Keep up the good work.
Retraction of Correction: March 4, 2019
When I first saw the image I thought it was a lycosid (wolf spider). I sent it to an arachnologist at the CAS and he identified the spider as Genus Syspira, Family Miturgidae. Since then I have consulted two other arachnologists, one from SDSU in CA, and they both informed me that the genus Syspira does not occur in Oklahoma. They checked hundreds of museum records for this genus through a third arachnologist at Colorado State University and the genus does not occur in SE CO nor in N Texas. They think the spider is in the genus Hogna (Lycosidae) but cannot be certain because, unfortunately, they cannot see the eye arrangement from the side view photograph. I’ve sent your higher resolution out for additional study but, since the genus Syspira does not occur in Oklahoma, this is probably a moot exercise. Thank you for your effort in aiding this identification dilemma.