atriceps. Formica atriceps Smith, F. 1858b: 44 (s.w.) BRAZIL. Mayr, 1862: 660 (q.); Forel, 1878: 76 (m.); Mariano et al., 2001: 269 (k.). Combination in Camponotus: Roger, 1862c: 285. Junior synonym of abdominalis: Roger, 1862c: 285; Santschi, 1913h: 42; Hashmi, 1973: 83. Subspecies of abdominalis: Emery, 1906c: 187; Forel, 1911c: 310. Senior synonym of taeniatus: Mayr, 1870a: 378. Oldest synonym of, and hence first available replacement name for, Formica abdominalis Fabricius, 1804: 409, designated by Bolton, 1995b: 86. [Junior primary homonym of Formica abdominalis Latreille, 1802c: 175.] Junior synonyms attached to abdominalis Fabricius by Hashmi, 1973: 82 are transferred to atriceps, which hence is senior synonym of: atricipitoesuriens, costaricensis, cupiens, depressidens, epistomatus, esuriens (and its junior synonym vulpinus), fuchsae, fulvacea, fumata, laevilata, mediopallidus, rabidus, romani, stercorarius, taeniatus, transvectus, ustulatus. Material of the unavailable names defrictus, flavobasalis, luisae, misionensis, panamanus, referred to abdominalis Fabricius by Hashmi, 1973: 82, is here referred to atriceps. Current subspecies: nominal plus nocens (status uncertain, see Hashmi, 1973: 120).