462 bulletin: museum of comparative zoology. 



50. F. DAKOTENSis Emery. 



F. dakolensis Emery, Zool. jahrb. Syst., 1893, 7, p. 652, taf. 22, fig. 5, ^ . 

 F. subpolita var. ? specularis Emery, Zool. jahrb. Syst., 1893, 7, p. 663, ? 

 {in part). 



Worker. Length 5-6 mm. 



Mandibles 8-toothed. Head, excluding the mandibles, as broad 

 as long, a little broader behind than in front, with feebly excised pos- 

 terior margin, broadly romided posterior corners, and convex sides. 

 Clypeus convex, sharply carinate, its anterior border not produced, 

 broadly rounded. Frontal area triangular, as long as broad; frontal 

 carinae strongly diverging. Antennal scapes slender at the base, 

 distinctly enlarged at their tips; funicular joints 2-4 a little more 

 slender and not much longer than the penultimate joints. Palpi 

 very short. Thorax shaped much like that of F. sanguinea, with 

 moderately convex pro- and mesonotum, moderately deep mesoepino- 

 tal constriction and the epinotum rather angular, with subequal base 

 and declivity, the former straight and horizontal in profile, the latter 

 slightly concave. Petiole narrow, in profile cuneate, thick below, 

 with rather strongly con^'ex anterior, more feebly convex posterior 

 surface, and blunt superior margin. Seen from behind it is narrow 

 below, but gradually broadening dorsally, with straight sides and hori- 

 zontal or feebly and broadly excised superior border, so that it appears 

 truncated above. 



Subopaque, very delicately shagreened; mandibles and clypeus 

 more shining, the former finely striatopunctate; clypeus very finely 

 longitudinally striated. Frontal area smooth and shining. Gaster 

 more distinctly shagreened than the body, shining with the same luster 

 as in F. truncicola obscuriventris and F. exsectoides. 



Upper surface of head, thorax, and petiole without hairs or with a 

 very few scattered yellow hairs. Those on the gaster longer, blunt 

 and scattered, apparently deciduous on the upper surface, longer and 

 more abundant on the venter. Gula and eyes hairless. Pubescence 

 very fine and sparse, scarcely perceptible on the body, more distinct 

 on the legs and scapes. 



Light or dark red, funiculi darker, gaster black or very dark brown, 

 the base of the first segment not distinctly reddish. 



Female (After Emery). Length 7.5-8 mm. 



Antennae, metanotum, tibiae, tarsi, and whole of gaster brown, first 

 gastric segment ferruginous red at the base. The whole insect very 

 shining; mesonotum and gaster as smooth as a mirror, the latter with 

 only a few small punctures which bear the very sparse, short pubes- 

 cence; erect hairs rather numerous on the base, tip, and venter of the 

 gaster, sparse and very short on the head, thorax, and petiole; lower 



