Microrhagus Dejean, 1833

Otto, Robert L., 2015, Eucnemid larvae of the Nearctic region. Part V: Fifth instar larval descriptions for eight species of Microrhagus Dejean, 1833 (Coleoptera: Eucnemidae: Melasinae: Dirhagini), with descriptions of four new species and notes on their biology, Insecta Mundi 2015 (421), pp. 1-46 : 3

Genus Microrhagus Dejean, 1833

Diagnosis. Characters of Dirhagini , with apical margin of frontolclypeal region trilobed and more than twice as wide as the distance between antennal sockets; well-developed notosternal antennal grooves present, usually with smooth surfaces; male prothoracic tarsomere I simple, with apical sex combs; metathoracic coxal plates medially 3.0–6.0 times wider than laterally; last visible ventrite either rounded or truncated; poorly defined deep hypomeral pits near prothoracic coxae; interrupted lateral pronotal ridges; lateral surfaces of mesothoracic and metathoracic tibiae with setae only; male aedeagus dorsoventrally compressed; lateral lobes bilobed and directed dorsocaudad; median lobe simple, deeply and widely bifurcate apically; flagellum complex and tubular.