wheeler: ants of the genus formica. 419 



which agree with these. From the fact that Pergande found the 

 species hving with F. paUidcfulva, Emery has inferred that it is dulotic 

 Uke sanguinea. 



F. pergandei is readily distinguished from sanguinea by its narrow 

 head and body, its bro^wai color and smoother surface. From F. 

 munda it differs in having the erect hairs slender and pointed, in its 

 duller coloration, narrower head and shorter maxillary palpi. 



IG. F. EMERYi, sp. nov. 



F. pergandei Wheeler, Bull. Amer. mus. nat. hist., 1905, 21, p. 268. 



Worker. Length 4.5-6 mm. 



Head a little longer than broad, a little narrower in front than 

 behind, with straight cheeks and posterior border. Mandibles 

 8-toothed. Maxillary palpi short. Clypeus sharply carinate, its 

 anterior margin neither produced nor impressed but feebly and nar- 

 rowly notched in the middle. Antennae rather robust ; scapes slightly 

 enlarged towards their tips; funicular joints subequai; joints 2-5 

 a little more slender than the succeeding joints. Thorax rather long, 

 pro- and mesonotum depressed, mesoepinotal constriction narrow, 

 the posterior surface of the mesonotum falling suddenly to the level 

 of the metanotum; epinotum angular, with subequai base and de- 

 clivity, the former with a very faint transverse impression in the 

 middle. Petiole narrow; cuneate in profile, with straight posterior 

 and very feebly convex anterior surface, its border entire, rounded and 

 rather sharp. Gaster elliptical, more elongate than in any of the pre- 

 ceding species. Legs stout and rather long. 



Mandibles shining, very finely and rather superficially striated, 

 with very fine, scattered punctures. Remainder of body opaque, 

 its surface very finely and uniformly shagreened ; gaster with a slightly 

 metaUic luster. 



Pilosity and pubescence gray, the fomier represented by only a few 

 erect hairs on the front and clypeus and two transverse rows of sparse 

 hairs on each gasti-ic segment, which are somewhat longer towards 

 the tip and on the venter. Tibiae each with a row of bristles on their 

 flexor surfaces. Pubescence extremely short and inconspicuous on 

 the head, thorax, petiole, and legs, a little longer and much denser 

 on the gaster, so that this region has a grayish tint. 



Brown; gaster black; mandibles red; dorsal portion of head infus- 

 cated or blackened. 



Female. Length 7-7.5 mm. 



Closely resembling the worker in sculpture, pilosity, and color. 

 Mandibles much more coarsely striatopunctate. Clypeus with 



