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 Linné. 
F. rufa Linné, Syst. nat., ed. 10, 1758, 1, p. 580; de Geer, Mem. hist. ins., 
1771, 2, p. 1053, pl. 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, 8 @ o; Hist. nat. fourmis, 1802, 
p. 143, pl. 5, fig. 28, a, b, g, h.; Fabricius, Syst. Piez., 1804, p. 398, 8 9 oH; 
Latreille, Hist. nat. ins., 1805, 18, 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, pl. 18, fig. 16, 8 @ o; Forster, 
Hymen. stud., 1850, 1, p. 18, 8 9 o&; F. Smith, Trans. Ent. soc. Lond., 
1855, ser. 2, 3, p. 100, pl. 9, fig. 18, 8 9 o; Nylander, Ann. sci. nat. 
Zool., 1856, ser. 4, 5, p. 60, pl. 3, fig. 3; Mayr, Progr. realsch. Pest., 1856, 
p. 9,8; F. Smith, List Brit. anim. Brit. mus., 1858, pt. 6, p. 3; Mayr, 
Europ. Formicid. 1861, p. 46,48, 8 @ o&; Forel, Denks. Schweiz. gesell. 
naturw., 1874, 26, p. 52, 55, 57, 364, 8 @ o; Bull. Soc. Vaud. sci. nat., 
1875, ser. 2, 14, p. 57, 59; Ern. André, Spec. Hymén. Europe, 1882, 2, 
pt. 14, p. 184, 187, 189, pl.1, 5,6,9, 8 @ o; Lubbock, Ants, bees, wasps, 
ed. 5, 1882, p. 441, pl. 2, fig.5, 8 ; 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. 
. dorsata, v. d. Hooven, Bijdr. natuurk. vet., 1826, 1, p. 441. 
. obsoleta Zetterstedt, Insect. Lappon., 1838, 1, p. 449, 8 @. 
. lugubris Zetterstedt, Insect. Lappon., 1838, 1, p. 449, <. 
. polyctena Forster, Hymen. stud., 1850, 1, p. 15, 8 @ o; Schenck, Jahrb. 
Ver. nat. Nassau, 1852, 8, p. 25, 137, 8 @ o; Stettin. ent. zeit., 1853, 
14, p. 160. 
F, truncicola Forster, Hymen. stud., 1850, 1, p. 21 8 , (excl. 9 <%). 
. piniphila Schenck, Jahrb. Ver. nat. Nassau, 1852, 8, p. 28, 188, 8 9 o. 
F. apicalis F. Smith, List Brit. anim. Brit. mus., 1858, pt. 6, p. 49, 9. 
o> ee a> ae! 
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