Aphaenogaster concolor

Japanese Name

Ryuukyuu-ashinaga-ari

Watanabe, H. & Yamane, S. (1999) New species and new status in the genus Aphaenogaster (Formicidae) from Japan. In: Identification Guide to the Aculeata of the Nansei Islands, pp. 730-731, Hokkaido Univ. Press, Sapporo.

Total length of workers 4.5 - 6 mm. Head and mesosoma brown to yellowish brown; gaster blackish to dark brown; legs yellowish brown. Similar to Aphaenogaster famelica and its subspecies erabu, but separable in having striation and punctation on the pronotal dorsum, and angulate pronotal humeri.

The taxon varies in form and color. As conceived here it could include several closely similar species. Nests are found in woodland or its margins, in the soil, under wood or in wood cavities.

Nansei Is (Okinoerabujima, Okinawa I.).