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 188. Formica Pennsylvanica . Formica Pennsylvanica , De Geer, Hist. Ins. iii. 603.4. pl. 31. f. 9, 10. Oliv. Encycl Meth. vi. 501. 52. St. Farg. Hym. i. 213. 14. Formica pubescens (var.), Latr. Hist. Nat. Fourm. 99. Hab, Pennsylvania.