Myrmica (Monomorium) marylandica Buckley, 1867: 339 (w.) U.S.A. (District of Columbia, Maryland). Nearctic.

Primary type information: Type-material: syntype workers (number not stated). Type-localities: U.S.A.: nr Washington, D.C. (S.B. Buckley), U.S.A.: Maryland, Baltimore, Druid Hill Park (S.B. Buckley). Type-depository: unknown (no material known to exist).