WHEELER: ANTS OF THE GENUS FORMICA. 485 
hairs and pubescence. There are prominent golden yellow hairs on 
the clypeus, front, and vertex and on the dorsum of the pro- and 
mesonotum, and the hairs on the gaster, which are also golden or 
fulvous, are coarser. The pubescence is grayish and denser on all 
parts of the body but especially on the gaster. This region is also 
more coarsely shagreened and therefore subopaque or opaque and not 
shining. The funiculi and the tips of the scapes are fuscous, in other 
respects the color is like that of the typical form. 
Mate. Length 7.5 mm. 
Differing from the male of the typical easectoides in having the thorax 
and gaster invested with longer pubescence and the mesonotum and 
scutellum covered with more abundant subappressed hairs. HEyes 
hairy. The single rather immature specimen examined has bidentate 
mandibles. The petiole is broadly excised in the middle and its 
margin has the form of a pointed, compressed tooth on each side of the 
excision. 
Typr Locatity.— Colorado: Breckenridge (Emery). 
Colorado: Boulder (P. J. Schmitt and Wheeler); Florissant 
(Wheeler). 
This is, in my opinion, a sharply marked subspecies and not a mere 
variety. It is readily distinguished from the typical form also in its 
habits. Its nests resemble those of the eastern form in size and shape, 
but are made of earth and pebbles instead of earth and vegetable 
detritus. At least this was the case with several nests which I saw 
at Florissant. When these nests were situated near the railroad track 
they were covered also with locomotive cinders which the ants had 
carefully collected. All the nests examined were in open country, 
not in woods. 
70. F. utker Emery. 
F. ulket Emery, Zool. jahrb. Syst., 1893, 7, p. 653, pl. 22, fig. 7, 8 ; Wheeler, 
Ants, 1910, p. 446, 570. 
Worker. Length 3.5-6 mm. 
Mandibles with 8 teeth on the apical and a few indistinct denticles 
on the basal margin. Head, excluding the mandibles, distinctly 
longer than broad, very slightly narrower in front than behind, with 
broadly and deeply excised posterior border and rather straight sides. 
Front convex, vertex less flattened than in easectoides. Clypeus 
carinate, but less acutely than in exsectoides, its anterior margin, 
angularly produced. Frontal area triangular, a little broader than 
long; frontal carinae at first diverging posteriorly but at their posterior 
