REVISION OF THE INTERTIDAL ALEOCHARINE GENUS AMBLOPUSA CASEY AND DESCRIPTION OF THE NEW GENUS PARAMBLOPUSA (COLEOPTERA, STAPHYLINIDAE)

A systematic revision of the aleocharine genus Amblopusa Casey is pres ented. Amblopusa Casey is redescribed, and three species are recognize d, two of which are new (A. alaskana Ahn and Ashe and A. hokkaidona Ah n and Ashe). Late instar larvae of A. alaskana Ahn and Ashe are descri bed. Boreorhadinus Sawada is synonymized under Amblopusa Casey and Bor eorhadinus pacificus Sawada is synonymized under A. brevipes Casey. Ty pe and paratypes of A. alaskana and A. hokkaidona are designated. Lect otype is designated for A. brevipes. New genus Paramblopusa is describ ed to contain A. borealis. Lectotype and paralectotypes are designated for P. borealis. A key is provided for separation of the genera Amblo pusa and Paramblopusa and the known species of Amblopusa, and illustra tions of diagnostic features are presented.