Formica rufa r. obscuripes Forel, 1886b: xxxix (w.) U.S.A. (Wyoming). Nearctic.

Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: U.S.A.: Wyoming, Green River (S.H. Scudder). Primary type depositories: MCZC, USNM.

Infrasubspecies

• F. r. o. whymperi Forel, 1904