Melikertini

Key to Genera of Melikertini

(updated and revised from Engel and Davis, 2021)

1. Disc of clypeus comparatively flat, without distinct lateral carinae and without belllike concavity............................... 2

—. Clypeus with lateral carinae rising from apex to form margins of belllike concavity arising from base of clypeus and overhanging disc...................... Aethemelikertes Engel

2(1). Clypeal protrusion present, i.e., base of clypeus produced into variously modified facial prominences, prominence bending upward over fronto-clypeal portion of epistomal sulcus and obscuring supraclypeal area or even lowermost frons in facial view................ 3

—. Clypeal protrusion absent................ 4

3(2). Apex of clypeal protrusion narrow, narrower than intertorular distance ... Succinapis Engel

—. Apex of clypeal protrusion broad, as wide as or slightly wider than intertorular distance............................ Haidomelikertes Engel

4(2). Mesoscutellum compressed (comparatively flattened) and extended.................. 5

—. Mesoscutellum rounded, not produced as extension............................... 6

5(4). Mesoscutellum formed as flattened, extended trapezoid, slightly longer than wide, with medioapical margin truncate [only workers known].............. Thyreomelikertes Engel , n. gen.

—. Mesoscutellum with prominent, elongate, tonguelike medioapical extension projecting over metanotum, propodeum, and portions of metasoma [only male known]........ Mochlomelikertes Engel, Breitkreuz, and Ohl

6(4). Mesoscutellum bulging, overhanging metanotum and propodeum; apical margins of metasomal terga distinctly lighter than remainder of metasoma, thus metasoma appears banded; anterior and posterior margins of metabasitarus distinctly converging toward apex............................ 7

—. Mesoscutellum not bulging, not overhanging metanotum or propodeum; metasomal terga