Catalogue of the hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. Author Smith, F. text 1858 British Museum London http://antbase.org/ants/publications/8127/8127.pdf book 8127 C86CFDBF-61D9-48EE-9C2E-325FC0462B10 56. Myrmica opposita . Myrmica opposita, Say , Bost. Journ. Nat. Hist. i. 292. 3. Hab. North America.