Euconnus longiceps Fall, an Odd Ant-like Stone Beetle from the Pacific Northwest (Coleoptera: Scydmaenidae)

Euconnus longiceps Fall, originally described from Alaska, is redescribed, and the labium, maxilla, mandible, antenna, male aedeagus, and female genitalia are illustrated and described for the first time. This species cannot be assigned readily to any of the subgenera recognized by T. L. Casey and is therefore placed as Euconnus Thomson, incertae sedis.