Macrotrichurus Silverstri 1946

Key to species of Macrotrichurus Silverstri, 1946 1. One pair of setae on vertex of the head, ligula almost indistinct, broadly rounded, abdominal tergite VIII longer than wide, with two rows each with four bristles on surface.................................. Macrotrichurus granzottorum sp. nov. - Two pairs of setae on vertex of the head, ligula stout and prominent, abdominal tergite VIII subquadrate, with one row of six bristles on surface.................................................................................... 2 2. Head and tergite surface without punctation, pronotum and elytra with sparse bristles, overall body covered with uniformly distributed, sparse bristles................................... M. brasiliensis Silverstri, 1946 (fig 7 in Silvestri 1946) - Head and tergite surface with punctation, pronotum and elytra densely covered with long bristles, overall body with dense pilosity.................................................... M. notabilis Silvestri, 1946 (fig 8 in Silvestri 1946)