Two new species of Enochrus Thomson (Coleoptera, Hydrophilidae) from Neotropical Region

Abstract

Enochrus (Methydrus) barituensis new species and Enochrus (Methydrus) robustus new species are describcd from the Neotropical Region. They are distinguished from all other known Ncotropical Enochrus (Methydrus) by the highly tectiform, anteriorly keel­shaped prostcmum. E. harituensis can be distinguished from E. robustus by its smaller size, by the prosternal crest and mesosternal crest and by the aedeagus morphology. Illustrations of the diagnostical characters are provided. The total number of Argentine species of Enochrus is here increased to 18 (one in the subgenus; Hydatothrephis, eight in Hugoscottia and nine in Methydrus).