Revision of the Nearctic Haliplidae (Coleoptera)

The Haliplidae of the Nearctic region are revised. The generic and subgeneric division as proposed by Vondel is accepted here. The subgenus Paraliaphlus Guignot, 1930 is redefined. One species is described as new: Peltodytes roughleyi sp. n. Haliplus ohioensis Wallis, 1933, H. ungularis Wallis, 1933 and H. canadensis Wallis, 1933 are established as junior synonyms of H. annulatus Roberts, 1913, H. cylindricus Roberts, 1913 and H. nitens LeConte, 1850, respectively. Peltodytes lengi Roberts, 1913 is established as junior synonym of P. duodecimpunctatus (Say, 1823). P. mexicanus (Wehncke, 1883) and P. dispersus Roberts, 1913 are both established as junior synonyms of P. simplex (LeConte, 1852). Lectotypes are designated for Haliplus blanchardi Roberts, 1913, H. confluentus Roberts, 1913, H. cylindricus Roberts, 1913, H. fasciatus Aubé, 1838, H. gracilis Roberts, 1913, H. leopardus Roberts, 1913, H. pantherinus Aubé, 1838, Peltodytes dispersus Roberts, 1913, P. duodecimpunctatus (Say, 1823), P. festivus (Wehncke, 1876), P. oppositus Roberts, 1913, P. sexmaculatus Roberts, 1913, P. shermani Roberts, 1913 and P. tortulosus Roberts, 1913. All species are illustrated and (re)described. A key to the Nearctic species is provided, as well as distribution maps.