WHEELER: ANTS OF THE GENUS FORMICA. 525 
Body but slightly more shining than in c7nerea. 
Pilosity and pubescence more abundant than in the var. altipetens 
but less abundant than in the typical cinerea, the erect hairs lacking 
on the sides of the head, pleurae, and extensor surfaces of the legs 
as in the former. Pubescence long and dense, but less silvery than in 
the European form. 
Body dark brownish, with the top of the head, the gaster and some- 
times the thoracic dorsum darker and more blackish. Antennal 
scapes scarcely infuscated at their tips. 
FEMALE. Length 8-10 mm. 
Closely resembling the worker in color, sculpture, and pilosity, but 
sides of head and thorax with sparse erect hairs as in the female of the 
typical cinerea. Mesonotum with three large fuscous blotches which 
are confluent behind, the mesopleurae, scutellum, metanotum, and 
base and sides of epinotum also fuscous. The red color of the anterior 
part of the head often extending back onto the front. Wings color- 
less, with pale brown veins and darker stigma. 
Mast. Length 7-8 mm. 
Closely resembling the male of the var. altipetens but the erect 
hairs on the head and thorax are more abundant and the genital 
appendages are less infuscated. The antennal scapes, bases of funi- 
culi, and in most specimens also the mandibles are sordid yellow. 
Wings as in the female. 
Type Locaity.— Illinois: Rockford (Wheeler). 
Illinois: New Bedford (G. E. Sanders). 
Indiana: Wilders (W. S. Blatchley). 
South Dakota: Harding County (S. S. Visher). 
Colorado: Breckenridge (P. J. Schmitt); Colorado Springs 
(Wheeler). 
California: San José (H. Heath); Palo Alto, Santa Cruz Mountains 
(W. M. Mann); Mesa Grande, Russian R. (J. C. Bradley). 
In color this variety approaches very closely the redder form of 
cmnerea which Forel has called cinereo-rufibarbis. Like the variety 
altipetens it nests in meadows and bogs, but its nests, though equally 
populous, are usually much flatter mounds. This ant is fond of nest- 
ing in the natural “hummocks,” which are so prominent a feature of 
the bogs and meadows of Illinois and the neighboring states. 
109. F. CINEREA CINEREA var. RUTILANS, var. nov. 
WorkEr. Length 4-5 mm. 
Head large and broad, thorax shaped like that of fusca, petiole much 
compressed anteroposteriorly, with very feebly convex anterior and 
