452 bulletin: museum of comparative zoology. 



the mandibles, clypeus, front, vertex, pronotum, gaster, fore eoxae> 

 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. ciLiATA Mayr. 



F. ciliata Mayr, Verb. Zool. bot. ver. Wien, 1886, 36, p. 428, 9 ; Emery,. 

 Zool. jahrb. Syst., 1893, 7, p. 655, pi. 22, fig. 12, 9 ; Wheeler, Bull. Amer. 

 mus. nat. hist., 1903, 19, p. 640, fig. 1, ^ 9 cf . 



Worker. 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. Frontal 

 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, mesoepinotal 

 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 

 fiattened posterior surface; border sharp, rounded on the sides, pro- 

 duced upwards as a blunt point in the middle. 



Mandil)les finely stria topunctate, 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. 



