body length ~ 13 mm\r\n\r\n\"This is likely Perithous s. neomexicanus, the western subspecies. The host is an aphid wasp in the genus Pemphredon. See reference here.\" BugGuide\r\n\r\nThat makes sense since these ichneumon wasps are hanging out around several Pemphredon tunnels in an old log.
View on iNaturalistView on GBIF
Observed on 17 Jun 2018.