WHEELER: ANTS OF THE GENUS FORMICA. 57 
F. rufibarbis clara Ruzsky, Zool. jahrb. Syst., 1902, 17, p. 471,8 92 o&; 
Formicar. Imper. Ross., 1905, p. 399. 
F. fusca rufibarbis var. clara Emery, Deutsch. ent. zeitschr., 1909, p. 198, 
NS (B 
WorkeER. Length 5-5.6 mm. 
Head, thorax, petiole, legs, and scapes pale ferruginous red; gaster 
dark brown; mandibles reddish brown. Some specimens have 
the tips of the scapes brownish and a spot of the same color on the 
vertex and occiput. Erect hairs lacking or very sparse; pubescence 
delicate and not very dense. 
FEMALE. Length 8-9.5 mm. 
Of the same color as very pale forms of the typical rufibarbis or even 
paler. Pubescence dense, sericeous on the body. Erect hairs sparse. 
Mate. Length 8.5-9 mm. 
Head dark brown, thorax and gaster brownish yellow. Mesonotum 
with three dark brown blotches and with the scutellum, part of the 
epinotum, petiolar border and spots on the pleurae of the same color. 
Legs, mandibles, and scapes yellowish brown; funiculi brown; wings 
infuscated. 
Southern Russia, Siberia, Central Asia, Caucasus, Syria. 
100. F. RUFIBARBIS var. CAUCASICA Ruzsky. 
F. rufibarbis clara var. caucasica Ruzsky, Formicar. Imper. Ross., 1905, p. 401, 
an 
F. fusca rufibarbis var. caucasica Emery, Deutsch. ent. zeitschr., 1909, p. 
198, 8. 
Worker. Color as in the var. clara or only slightly darker, red or 
brownish red. Erect hairs lacking, with sparse, appressed hairs only 
on the sides of the head and thorax and on the legs and clypeus. Sculp- 
ture of body more delicate than in the var. clara, the whole body being 
subopaque, with feeble luster. Frontal area smooth and shining. 
Caucasus Mountains. 
101. F. RUFIBARBIS var. occipUA Wheeler. 
F. rufibarbis Wheeler, Amer. nat., 1902, 36, p. 947 et seg, 8 . 
F. rufibarbis var. occidentalis Wheeler, Ants, 1910, p. 570. 
F. rufibarbis var. occidua, nom. nov. Wheeler, Psyche, 1912, 19, p. 90. 
Worker. Length 4-7.5 mm. 
Differing from the typical form of Europe only in pilosity. The 
thorax is either entirely without erect hairs or has only a few on the 
