Entypus fulvicornis is a species of spider wasp belonging to the family Pompilidae.

The species has a muscled, strong physique, unlike many other spider wasps (excluding Pepsis and Hemipepsis).

[2] Entypus fulvicornis has been observed hunting wolf spiders of the genus Hogna in Cape May County, New Jersey and the wolf spider Schizocosa avida in Myrtle Beach, South Carolina, in the latter case the female wasp was walking backwards across a lawn with a male spider held in the mandibles by the base of its left foreleg or pedipalp.

These wasps are typically encountered in the late summer or early autumn.

[5] They have been recorded nectaring from a wide variety of flowers including species in the families Apiaceae, Asclepiadaceae, Asteraceae, Caesalpiniaceae, Euphorbiaceae, Fabaceae, Lamiaceae, Phytolaccaceae, Polygonaceae and Rubiaceae.