June, 1909.] Wheeler : North AiMERican FoRMiciDi^. 87 



long on the epinotum, border of petiole, basal gastric segment and venter, somewhat 

 shorter on the clypeus and pronotum and still shorter on the upper surface of the gaster. 

 Eyes hairless. 



Black; borders of mandibles, tibise, tarsi and articulations of legs brownish, or in 

 some specimens yellowish. Genitalia sordid yellow. Wings like those of the female. 



Described from a dozen workers, five females and six males taken 

 from a single colony at Manitou, Colorado (July 26, 1906). I have 

 taken this species (four females and several workers) also in Red Rock 

 Canon, near Colorado Springs in the same state (July 28, 1903). F. 

 coinata may represent a hybrid between F. ciliata and F. rufa obscu- 

 ripes Forel or F. rufa rubiginosa Emery. The female, though it com- 

 bines certain characters of all these forms, is very distinct on account 

 of its peculiar coloration and pilosity. It is much more difficult to 

 distinguish the workers. The legs are paler, the body more hairy and 

 the abdomen darker than in the ciliata worker, and the larger workers 

 of the latter species lack the dark spots on the thorax. In the worker 

 obscuripes and rubiginosa the hairs on the head and thorax are much 

 more abundant and more erect than in ciliata and comata and the in- 

 fuscation of obscuripes workers of all sizes is much more pronounced 

 and extensive. The male of coinata differs from that of ciliata and 

 obscuripes in having dentate mandibles and somewhat paler wings. 

 The nest of comata is not a mound like that of obscuripes, but is ex- 

 cavated, like that of ciliata, under stones and these are rather heavily 

 /banked or even covered with vegetable detritus. 



v 



9. Formica crinita, new species. 



Worker. — Length 4-6.5 mm. 



Resembling the worker of the preceding species but averaging somewhat smaller. 

 Head, excluding the mandibles, a little longer than broad, even in the largest 

 workers ; narrower in front than behind, with nearly straight posterior and lateral 

 margins. Eyes rather large. Mandibles 7-8 toothed. Clypeus carinate, with entire 

 anterior border, slightly projecting in the middle. Frontal furrow distinct. Antennae, 

 thorax and petiole as in comata. Palpi rather short. Gaster and legs of the usual 

 shape. 



Body subopaque, very finely shagreened ; bases of mandibles, frontal area and 

 corners of clypeus glabrous. Mandibles and clypeus finely, longitudinally striated. 



Hairs yellow ; absent on the head, thorax, petiole and appendages, blunt and 

 scattered on the gaster, pointed on the clypeus, mandibles and venter. Pubescence 

 yellowish and very short, inconspicuous on the head, thorax and petiole, somewhat 

 longer on the legs and gaster; on the latter rather dense and nearly concealing the 

 surface. Eyes hairless. 



Yellowish-red ; gaster dark reddish-brown, except the anal region and a spot at 

 the base of the first segment, which are yellowish ; tips of antennal funiculi, middle 



