Members of these two genera have ground burrows and provision with caterpillars. The members of this subfamily are small, black, with petiolate abdomens. Two Tribes are recognized. At least two species have been collected. Pemphredon sp. has been taken from savanna areas and a few specimens of Stigmus sp and Passaloecus sp also collected.
Some undetermined material remains.
Four Tribes are recognized. The Miscophini have normal ocelli, but distinctive Larrinae venation. The Trypoxylonini include your slender black Organ Pipe mud daubers that provision with spiders. Several specimens of. Trypoxylon spp have been collected.