The genus Acerocephala and observations of the life history of Acerocephala hanuuanamu sp. nov. (Hymenoptera, Cerocephalidae) and its bark beetle host on the island of O‘ahu, Hawai‘i

Acerocephala atroviolacea and Acerocephala aenigma. Acerocephala atroviolacea paratype ♀ (a–e); A. aenigma holotype ♀ (f–h) (photos from NMNH database); A. aenigma allotype ♂ (j–l) a, f, j side view b, h, l head c, g, k dorsal view d anterior view of head showing mandibles e side view of head showing antenna i A. aenigma antenna (paratype ♀) m A. aenigma antenna (paratype ♂).