Labilochus brevipalpis, a new genus and species with extremely long mouthparts (Hymenoptera, Ichneumonidae, Tersilochinae) from Mexico

Labilochus brevipalpis gen. & sp. n. from northeast Mexico is described and illustrated. The new genus is distinguished from all other Tersilochinae taxa by its extremely long glossa and galeae in combination with short maxillary and labial palps, and both palps with reduced number of palpomeres. The genus also possesses a remarkable head, which is almost straight behind the eyes in dorsal view and with the occipital carina lacking laterally.