Paratachys (Tachys), Dejean, 1821

Bousquet, Yves, 2012, Catalogue of Geadephaga (Coleoptera, Adephaga) of America, north of Mexico, ZooKeys 245, pp. 1-1722 : 448

Subgenus Tachys Dejean, 1821

Tachys Dejean, 1821: 16. Type species: Tachys scutellaris Stephens, 1828 designated by Hope (1838: 61) (see ICZN 1990).

Tachymantes Gistel, 1856: 359. Type species: Tachys scutellaris Stephens, 1828 designated by Bousquet (2002b: 49).

Isotachys Casey, 1918: 204. Type species: Tachys vittiger LeConte, 1852 designated by Lindroth (1966: 427). Synonymy established by Ball (1960b: 119). Etymology. From the Greek isos (equal) and the generic name Tachys [ q.v.] [masculine].

Diversity.

About 35 species in the Nearctic (11 species), Neotropical (seven species), Australian (one non-endemic species), Oriental (five species), Palaearctic (12 species, none in the Far East), and Afrotropical (seven species, three shared with Eurasia) Regions. One species, Tachys oahuensis Blackburn, is endemic to the Hawaiian Islands.

Identification.

Lindroth (1966: 427-431) treated five (one of them, Tachys corax , in the key only) of the species found in North America and Hayward (1900: 218-224) eight species. A taxonomic revision of the species of this subgenus is needed.