516 bulletin: museum of comparative zoology. 



long ago showed that its habits and disposition are peeuhar. It nests 

 under stones or in open ground without building craters or mounds 

 and in disposition is quite unlike the fusca forms, being very agile, 

 fierce, and aggressive. It also has a peculiar odor cpite unlike that of 

 fusca, and this, together with the pugnacious disposition, also charac- 

 terizes the American varieties. 



97. F. RUFiBARBis var. glauca Ruzsky. 



F. rufibarhis var. glauca Ruzsky, Arb. Ges. naturf. Kasan, 1895, 28, p. 20, ^ ; 

 Berlin, ent. zeitschr., 1896, 41, p. 70; Forel, Ann. Mus. St. Petersbourg, 

 1904, 8, p. 385; Ruzsky, Formicar. Imper. Ross. 1905, p. 396. 



F. fusca rufibarhis var. glauca Emery, Deutsch. ent. zeitschr., 1909, p. 198, ^ . 



Worker. Differing from the typical form in having the pubescence 

 denser and with a bluish, silky luster on the gaster. The color and 

 pilosity are like those of the typical form. 



Southern Russia and Western Siberia. 



98. F. RUFIBARBIS var. subpilosa Ruzsky. 



F. rubibarhis var. subpilosa Ruzsky, Ants envir. Aral Sea (Russian), 1902, p. 

 9, y ; Zool. jahrb. Syst., 1902, 17, p. 472; Forel, Ann. Mus. St. Peters- 

 bourg, 1904, 8, p. 18; Ruzsk}', Formicar. Imper. Ross., 1905, p. 397; 

 Karawajew, Hor. Soc. ent. Ross., 1909, 39, p. 16. 



F. fusca rufibarhis var . subpilosa'Emery , Deutsch. ent. zeitschr., 1909, p. 198, ^ . 



Worker. Color as in pale specimens of the typical rufiharhis. 

 Pubescence whitish, dense on the gaster, which therefore has a gray 

 tinge. Hairs also whitish, short, covering the whole body, but absent 

 on the gula. Petiole moderately thick, with rather sharp superior 

 border. 



Central Europe, Southern Russia, and Central Asia to Western 

 China. 



This form resembles F. cinerca var. imitans but can be distinguished 

 by the absence of erect hairs on the gula. The color, according to 

 Ruzsky, is very variable, specimens from the x\ral Sea region being 

 very pale, like the var. clara, whereas those from Central Europe, the 

 Crimea, Southeastern Russia, and the Caucasus are darker and more 

 like the typical rufiharhis. 



99. F. RUFIBARBIS var. clara Forel. 



F. rufibarhis var. clara Forel, Ann. Soc. ent. Belg., 1886, 30, p. 206, ^ ; Ann. 

 Mus. St. Petersbourg, 1904, 8, p. 384. 



