wheeler: ants of the genus formica. 425 



Described from three workers and two males. A large number of 

 the workers from Alberta are somewhat less shining but agree in other 

 respects with the types. 



The worker of this species is easily distinguished from all the other 

 forms in the sanguinea group by its uniform red color and dense 

 pilosity, which is much like that of cinerea. Indeed, were it not for 

 the emarginaton of the clypeal border, it might be placed in the fusca 

 group. The male is also very peculiar in its shining head and thorax, 

 the unusual shape of the head, large size of the eyes and dense pilosity. 



Rufa Group. 

 20. Formica rufa rufa Linne. 



F. rufa Linn6, Syst. nat., ed. 10, 1758, 1, p. 580; de Geer, Mem. hist, ins., 

 1771, 2, p. 1053, pi. 41, 42, fig. 1-11; Fabricius, Syst. ent., 1775, p. 391; 

 Spec. Ins., 1781, 1, p. 489; Mant. ins., 1787, 1, p. 308; Latreille, Essai 

 hist, fourmis France, 1798, p. 39, ^ ? cf; Hist. nat. fourmis, 1802, 

 p. 143, pi. 5, fig. 28, a, b, g, h. ; Fabricius, Syst. Piez., 1804, p. 398, ^ 9 cT ; 

 Latreille, Hist. nat. ins., 1805, 13, p. 255; Gen. Crust, ins., 1809, 4, 

 p. 126; F. Smith, Trans. Ent. soc. Lond., 1842, 3, p. 151-154; Nylander, 

 Act. Soc. sci. Fennica, 1846, 2, p. 902, pi. 18, fig. 16, ^ ? cf; Forster, 

 Hymen, stud., 1850, 1, p. 13, ^ 9 cf; F. Smith, Trans. Ent. soc. Lond., 

 1855, ser. 2, 3, p. 100, pi. 9, fig. 13, y 9 d'] Nylander, Ann. sci. nat. 

 Zool., 1856, ser. 4, 5, p. 60, pi. 3, fig. 3; Mayr, Progr. realsch. Pest., 1856, 

 p. 9, S ; F. Smith, List Brit. anim. Brit, mus., 1858, pt. 6, p. 3; Mayr, 

 Europ. Formicid. 1861, p. 46, 48, S 9 cf; Forel, Denks. Schweiz. gesell. 

 naturw., 1874, 26, p. .52, 55, 57, 364, ^ 9 cf; Bull. Soc. Vaud. sci. nat., 

 1875, ser. 2, 14, p. 57, 59; Ern. Andr6, Spec. Hymen. Europe, 1882, 2, 

 pt. 14, p. 184, 187, 189, pi. 1, 5, 6, 9, ^ 9 c?; Lubbock, Ants, bees, wasps, 

 ed. 5, 1882, p. 441, pi. 2, fig. 5, ^ ; Dalla Torre, Catalog. Hymen., 1893, 

 7, p. 206-209; Ruzsky, Formicar. Imper. Ross., 1905, p. 320, fig. 59-62; 

 Emery, Deutschr. ent. zeitschr., 1909, p. 184. 



F. dorsata, v. d. Hooven, Bijdr. natuurk. vet., 1826, 1, p. 441. 



F. ohsoleta Zetterstedt, Insect. Lappon., 1838, 1, p. 449, ^ 9. 



F. lugubris Zetterstedt, Insect. Lappon., 1838, 1, p. 449, cf . 



F. polydena Forster, Hymen, stud., 1850, 1, p. 15, S 9 cf; Schenck, Jahrb. 

 Ver. nat. Nassau, 1852, 8, p. 25, 137, ^ 9 d", Stettin, ent. zeit., 1853, 

 14, p. 160. 



F. truncicola Forster, Hymen, stud., 1850, 1, p. 21 ^ , (excl. 9 cf). 



F. -pini-phila Schenck, Jahrb. Ver. nat. Nassau, 1852, 8, p. 28, 138, ^ 9 d. 



F. apicalis F. Smith, List Brit. anim. Brit, mus., 1858, pt. 6, p. 49, 9 . 



