452 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
the mandibles, clypeus, front, vertex, pronotum, gaster, fore coxae, 
and in a single row on the flexor surface of the femora, tibiae, and tarsi. 
On the gaster the hairs, very conspicuous in certain lights, are present 
in three or four rows on each of the segments. Pubescence grayish, 
very fine, dense on the gaster, somewhat sparser on the head, thorax, 
scapes, and legs. 
Brownish red; front, upper surface of thorax, petiole, and femora, 
especially the hind pair, darker or infuscated; gaster black. 
Described from several specimens taken from two colonies at alti- 
tudes of 4,500 and 5,600 ft. in the Huachuca Mountains, Arizona, by 
Mr. C. R. Biedermann. 
At first sight the species closely resembles a small F. sanguinea 
rubicunda, especially in the shape of the thorax and petiole and in 
pilosity, but it differs in having the anterior border of the clypeus 
projecting and entire, and in the much longer maxillary palpi, much 
more slender antennae, and the coloration of the head and thorax. 
44. F. crurata Mayr. 
F. ciliata Mayr, Verh. Zool. bot. ver. Wien, 1886, 36, p. 428, 9; Emery, 
Zool. jahrb. Syst., 1893, 7, p. 655, pl. 22, fig. 12, 9; Wheeler, Bull. Amer. 
mus. nat. hist., 1903, 19, p. 640, fig.1, 8 @ o&. 
WorkKErR. Length 3-8 mm. . 
Mandibles 8-toothed. Clypeus sharply carinate its entire length, 
its anterior border broadly rounded, not produced. Head, excluding 
the mandibles, fully as broad as long, a little narrower in front than 
behind; occipital border slightly concave, especially in large specimens; 
posterior corners rounded, sides feebly convex, cheeks long. F rontal 
carinae distinctly diverging behind. Antennae slender, funicular 
joints 1-4 longer and more slender than the penultimate joints. Max- 
illary palpi short, pro- and mesonotum not very convex, mesoépinotal 
constriction not very deep, base and declivity of epinotum subequal, 
forming a distinct obtuse angle with each other, the former in pro- 
file straight or feebly convex, the latter slightly concave. Petiole 
rather narrow, cuneate in profile, with slightly convex anterior and 
flattened posterior surface; border sharp, rounded on the sides, pro- 
duced upwards as a blunt point in the middle. 
Mandibles finely striatopunctate, feebly shining. Clypeus very 
finely longitudinally striated, remainder of the body delicately sha- 
greened. Whole body opaque, except the frontal area, which is 
smooth and shining. The clypeus and even the whole head in the 
largest workers from some colonies, may be more or less shining. 
