A revision of the Chilean Brachyglutini – Part 3. Revision of Achilia Reitter, 1890: A. frontalis species group (Coleoptera: Staphylinidae: Pselaphinae)

The Achilia frontalis species group (sensu Jeannel, 1962; 1964) of the species-rich genus Achilia Reitter, 1890 is revised. Of the thirteen taxa placed in this group of species, five names are here synonymized: A. validicornis Jeannel, 1962 = A. excisa (Schaufuss, 1880) (syn. nov.), A. pseudovalidicornis Franz, 1996 = A. pachycera Jeannel, 1963 (syn. nov.), A. acicularis Jeannel, 1962 = A. testacea Jeannel, 1962 (syn. nov.), A. foveifrons Jeannel, 1962 = A. frontalis Jeannel, 1962 (syn. nov.), and A. validicorniformis Franz, 1996 = A. larvata (Reitter, 1885) (syn. nov.). Lectotypes are designated for A. excisa and A. validicornis. The remaining eight species are redescribed, their main diagnostic features are illustrated, their distributions are detailed, and data available on habitat/collecting are summarized. Two new species – Achilia trauco sp. nov. and Achilia fiura sp. nov. – are also described and added to the group, while A. longispina Franz, 1996, is removed from it.