Eresus sandaliatus in haar rol betrapt

A single specimen of the pompilid wasp Eoferreola rhombica (Christ, 1791) was captured during a faunal survey of road verges. The specimen was found in a pitfall on the Veluwe (Province of Gelderland). This species is specialized in that it searches for female Eresus (sandaliatus in the Netherlands) and after paralysing it and depositing its egg on it leaves the specimen in the spider's burrow instead of digging a separate burrow for its prey. The latter is the rule with pompilid wasps. The reader is referred to the original article with a description and picture of the wasp, and the distribution pattern of the spider in the Netherlands.