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, 421, Jun 5 2015: 1-46. 19 [Zoological Record Volume 151]