Xiphydria erythrogaster, sp. nov.— ♀. Length, 9.8 mm. Head and thorax black, marked with yellow as follows: The black of the head is confined to the occiput, a large spot on the crown is dilated on each side, but does not quite reach the eye, while the yellow is confined to the cheeks, the face to above the insertion of the antennæ, the front orbits and a V-shaped mark above the eyes. Mandibles yellow, with black teeth; prothorax yellow, with a black line on collar above and a black mark in the lateral depressions; mesonotum black, with two yellow spots on the disc; scutellum with the axillæ yellow; meso- and meta-sternum yellow, with black marks.