wheeler: ants of the genus formica. 413 



Host (Slave). F.fusca var. subsericea. 



Described from several specimens taken from a single colony at 

 Tuckahoe, N. Y. To the same variety I refer a number of workers 

 which I took from several nests at Calhoun, Waukesha County, Wis- 

 consin, although these specimens are somewhat darker and more 

 reddish. In these respects they are transitional to the typical sub- 

 infegra. 



12. F. sanguinea puberula Emery. 



F. sayiguinea subsp. puberula Emery, Zool. jahrb. Syst., 1893, 7, p. 648, ^ ; 

 Wheeler, Ants, 1910, p. 458, 570. 



Worker. Length 4-6 mm. 



Head rather large, in large workers shaped like that of rubicunda, 

 with less convex sides, and less rounded posterior angles than in 

 subintegra. Clypeal notch broad and rather deep. Antennal scapes 

 often distinctly thickened towards their tips. Thorax and petiole 

 similar to those of subintegra, but the latter more compressed antero- 

 posteriorly, less convex anteriorly and usually with a sharper upper 

 border, which is sometimes feebly notched in the middle. 



Surface of body as in subintegra; mandibles more shining because 

 more densely and superficially striated and less distinctly punctate. 



Hairs yellow, more abundant than in subintegra, present on the pro- 

 and meson otum, petiolar border and gula. Those on the gaster are 

 long and slender. Anterior surfaces of tibiae with small, oblique 

 hairs and without appressed pubescence. Pubescence grayish, 

 moderately abundant on the gaster, finer and sparser but still visible 

 on the head and thorax, long on the antennal scapes, especially towards 

 their tips. 



Color like that of subintegra, the head, thorax, and appendages 

 being yellowish red, the gaster brown. 



Female. Length 7-8 mm. 



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

 Mandibles coarsely striatopunctate. Clypeal notch deep. Antennal 

 scapes considerably enlarged towards their tips. Mesonotum with- 

 out dark spots. Wings rather deeply infuscated at their bases. 



Male. Length 7-8 mm. 



Mandibles indistinctly toothed; clypeus convex, carinate, with 

 feebly but distinctly emarginate anterior border. Petiole transverse, 

 low and thick, with blunt, slightly excised superior border. 



Pilosity and pubescence much as in the male of subintegra, the 

 pubescence perhaps a trifle longer and more conspicuous on the legs. 



Black; antennae dark brown; legs yellow, the femora sometimes 

 infuscated. Genitalia brownish. Wings usually very deeply infus- 

 cated at their bases. 



