♂ ♀. Head (Fig. 2, A and B) long with well-marked postero-lateral angles, and distinctly angled posteriorly; bare above, behind the pre-antennal suture, except for two postero-lateral spines (1, 1). Antennae similar, the first joint of the ♂ larger and broader. Tergites and sternites indistinctly developed, consisting of small discontinuous chitinous areas at the base of the bristle; pleurties reduced, projecting shortly above and below in minutely denticulate or frayed points.