Formica hayashi

This species is common in mountainous areas, especially in Baekdudaegan, Korea (Dong & Kim, 2019).

Identification
Males of this species can be distinguished from the morphologically similar Formica japonica by the following characteristics (Terayama & Hashimoto, 1996; Dong & Kim, 2019):
 * Posterolateral corners of head rounded in frontal view.
 * Antennal scape long.
 * Absence of erect hairs on the 2nd gastral tergites excepting a row of hairs on the posterior margin.

Distribution based on Regional Taxon Lists
Palaearctic Region: Japan, Republic of Korea.

Nomenclature

 *  hayashi. Formica hayashi Terayama & Hashimoto, 1996: 4, figs. 8-12 (w.) JAPAN.