5 yay BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
Mate. Length 8-10 mm. 
Body slender, as in the typical fusca. Mandibles bidentate or 
edentate. Head shaped like that of the male of fusca. Petiole low 
and thick, with blunt superior border, which is transverse and feebly 
and broadly excised. 
Body, including the frontal area, opaque, gaster slightly glossy. 
Hairs grayish, erect, short, abundant, except on the upper surface 
of the gaster, oblique on the legs. Pubescence brownish, dense but 
shorter than in the worker so that the body is less silvery. 
Black; gaster dark brown, genitalia and legs yellow; the middle 
portions of the femora and the genital appendages sometimes infus- 
cated, scapes and mandibles often reddish or yellowish. 
Central and Southern Europe and Asia Minor (Caucasus Moun- 
tains). 
This species nearly always nests in pure sand or sandy soil, prefer- 
ring river and lake bottoms. It forms huge colonies often extending 
over many nests, the entrances of which are not surmounted by 
mounds but only by small, obscure craters. The color of the worker 
and female is variable, being sometimes as dark as the typical fusca, 
in other colonies more like rufibarbis. Specimens of the former 
coloration were called fusco-cinerea by Forel, of the latter cinereo-rufi- 
barbis. It is doubtful, however, whether these represent transitions 
to fusca and rufibarbis. 'They may be hybrid forms. 
104. IF’. CINEREA CINEREA var. FUSCO-CINEREA Forel. 
F. fusco-cinerea Forel, Denkschr. Schweiz. gesell. naturw., 1874, 26, p. 55, 57, 
58,8 Oi 
F. cinerea var. fusco-cinerea Dalla Torre, Catalog. Hymen., 1893, 7, p. 194. 
WorRKER AND FeMALE. Intermediate in pilosity and pubescence 
and also in habits between F’. fusca and cinerea. 
Mate. Apparently indistinguishable from the male of the typical 
cinerea. 
Zurich and Canton Vaud, Switzerland. Emery does not recognize 
this form in his revision of the Palaearctic Formicae. It is probably 
very closely related to the form described below as var. altipetens 
from Colorado. 
