wheeler: ants of the genus formica. 523 



105. F. ciNEREA ciNEREA var. IMITANS Ruzsky. 



F. cinerca var. imitans Ruzsky, Ants envir. Aral Sea (Russian), 1902, p. 10, 

 nota ^ ; Zool. jahrb. Syst., 1902, 17, p. 472; Formicar. Imper. Ross., 

 1905, p. 405, y 9 . 



F.fusca cinerea var. imitans Emery, Deutsch. ent. zeitschr., 1909, p. 199. 



Worker. Length 5-6.5 mm. 



Pubescence dense, giving the body a silky luster. Erect hairs 

 rather abundant, sparse on the thorax, more numerous on the gaster, 

 long on the gula. 



Color pale, resembling that of F. rufibarbis, the body being light 

 reddish brown, the gaster dark brown, the legs only slightly darker 

 than the thorax. Head and pronotum above each with a brown spot, 

 or the whole body dark brown above. Small workers darker. 



Ssamara and Orenburg in Western Siberia, Kirghis Steppe, Cauca- 

 sus. 



106. F. CINEREA CINEREA Var. ARMENIACA RuZsky. 



F. cinerea var. armeniaca Ruzsky, Formicar. Imper. Ross., 1905, p. 406, ^ 9 . 

 F.fusca cinerea var. armeniaca Emery, Deutsch. ent. zeitschr., 1909, p. 199. 



W^ORKER. Length 5-7 mm. 



Hairs not as numerous as in the typical cinerea; color darker, the 

 head, gaster, and funiculi dark or blackish brown; petiole, scapes, 

 mandibles, and legs brown. Specimens of still darker color and 

 somewhat more abundant pilosity and pubescence occur and form a 

 transition to the typical form. 



Female. Length 9-11 mm. 



Resembling the typical form except in the gaster, which is hairless 

 and shining. 



Caucasus Mountains. 



107. F. CINEREA CINEREA var. ALTIPETENS, var. nov. 



Worker. Length 3.5-6 mm. 



Shape of thorax like that of the worker fusca, with the epinotum 

 more angular and its declivity less sloping in profile, the mesoepinotal 

 constriction deeper and the pro- and mesonotum more convex. Peti- 

 ole broad, seen from behind cordate, the border notched in the middle 

 and much sharper than in the typical cinerea. 



Surface of body a little more shining, being more delicately sha- 

 greened. Frontal area opaque. Mandibles subopaque, coarsely 

 striatopunctate. 



