Hyphydrus megas n.sp. (Coleoptera: Dytiscidae), described from the Democratic Republic of Congo and Tanzania

Hyphydrus megas n.sp. is described from the Democratic Republic of Congo (formerly Zaire) and Tanzania on the basis of two male specimens. The new species belongs to the species group H. grandis, and including the new species it now contains five species. Distinguishing characteristics for the new species are presented. The occurrence of H. residuus Omer-Cooper in Tanzania was based on an incorrect determination and thus the species is here removed from the fauna of Tanzania