Primary type information:
Primary type material: holotype worker. Primary type locality: U.S.A.: North Dakota, Pembina County, 4 mi. N Gardar, 31.viii.1949 (E.L. Krause). Primary type depository: MCZC.
Secondary type information:
Secondary type material: paratype workers, paratype queens, paratype males (numbers not stated). Secondary type locality: same as for holotype. Secondary type depositories: DRIR, LACM, MCZC, UMAA, USNM.