1. Pedicel ovoid to elongate; antennomere III elongate (length greater than 2x width) (Fig. 6C); lacinia unisetose apically (Fig. 6F); larger species (> 1.25 mm)............................................... 2

— Pedicel subglobose; antennomere III short (length never greater than 2x width); lacinia bisetose apically; smaller species (<1.25 mm).......................... M. lundgreni Leschen and Carlton

2(1). Maxillary palpomere IV elongate and cylindrical, widest apically; labial palpomere I small, subglobose; habitus subhemisphaerical (Fig. 2B, 3)................. M. serraticornis Champion

— Maxillary palpomere IV less elongate, widest near midlength (Fig. 6F); labial palpomere I large, elongate and subcylindrical (Fig. 6G); habitus elongate-oval (Fig. 2C, 5)....................................................................................................................................... M. bahamaensis Shockley