A systematic revision of the genus Tarphiota is presented. Tarphiota C
asey is redescribed. Tarphiota fucicola and T. geniculata are redescri
bed. Tarphiota pallidipes synonymized under T. fucicola. Lectotype and
paralectotypes are designated for T. pallidipes, T. debilicollis, T.
hirsutula, T. iota, T. insolita, T. litorina, and T. seditiosa from Ca
sey's syntype series deposited in the NMNH. A key is provided for sepa
ration of the known species of Tarphiota and illustrations of diagnost
ic features are presented.