THE SYSTEMATIC STATUS OF AMBLYCYPHRUS-ASPERATUS, THRENUS-NIGER, PYCNOMORPHA-CALIFORNICA, EMMENASTUS-RUGOSUS, AND BIOMORPHUS-TUBERCULATUS MOTSCHULSKY (COLEOPTERA, TENEBRIONIDAE)

The systematic status of Amblycyphrus asperatus, Threnus niger, Pycnom orpha californica, Emmenastus rugosus, and Biomorphus tuberculatus Mot schulsky (Coleoptera: Tenebrionidae) is resolved. The following change s are proposed: Amblycyphrus is placed as a junior synonym of Cryptogl ossa Solier (Cryptoglossini); Amblycyphrus asperatus Motschulsky is pl aced as a junior synonym of Cryptoglossa spiculifera pectoralis (Blais dell) [new combination and status]; Threnus Motschulsky is placed as a synonym of Argoporis Horn (Cerenopini), Threnus niger Motschulsky bec omes Argoporis niger niger (Motschulsky) [new combination], Argoporis constanzae constanzae Berry is placed as a junior synonym of Argoporis niger niger (Motschulsky), Argoporis constanzae inflata Berry becomes Argoporis niger inflata Berry [new combination]; Emmenastus Motschuls ky is placed as a synonym of Oxycara Solier [Tentyriini]; Emmenastus r ugosus Motschulsky becomes Oxycara rugosa (Motschulsky) [new combinati on]; Biomorphus Motschulsky is placed as a synonym of Helops Fabricius ; Biomorphus tuberculatus Motschulsky is placed as a junior synonym of Helops attenuatus LeConte (Helopini); Pycnomorpha Motschulsky is reta ined as a valid genus with Pycnomorpha californica Motschulsky as type and two species added, Pycnormorpha gibbicollis (Horn) [new combinati on, transferred from Trichiasida], and Pycnomorpha tumidicollis (Blais dell) [new combination, transferred from Stenomorpha] (Asidini). Keys are provided to Pycnomorpha and its species.