Aproteles hulmerae has hitherto been known solely from fossil and modern cranial remains, and a single photograph of the ventral side of a study skin. It was believed to be extinct. We report upon the survival of a colony of approximately 137 individuals which roosts in a largely inaccessible doline in western Papua New Guinea. Three additional specimens are described here, and the external morphology and anterior dentition are described for the first time. Details of the roost site along with notes on reproduction, behaviour and diet are given.