558 bulletin: museum of comparative zoology. 



New York: Bronxville (Wheeler). 



Massachusetts: Essex County (G. B. King); South Natick 

 (A. P. Morse); Forest Hills, Blue Hills, Woods Hole (Wheeler). 



Illinois: Rockford (Wheeler). 



South Dakota: Hill City (Th. Pergande). 



New Mexico: Las Vegas (Mrs. W. P. Cockerell). 



Ontario: Guelph (W. H. Wright). 



This form is regarded by Emery as a distinct subspecies, but in my 

 opinion it is hardly more than a melanic variety of nitidiventris. Un- 

 like the preceding forms it nests only in woods, usually in lailly country 

 and is much rarer than any of the other varieties or subspecies. 



139. F. (N.) MOKi Wheeler. 



F. moki Wheeler, Bull. Amer. mus. nat. hist., 1906, 22, p. 343, ^ . 



Worker. Length 4-5.5 mm. 



Mandibles 8-toothed. Maxillary palpi very long, 5-jointed. Head, 

 excluding the mandibles, decidedly longer than broad, narrower in 

 front than behind, with straight posterior border and sides. Eyes 

 large and convex. Clypeus strongly carinate, its anterior border 

 rounded, projecting. Frontal carinae but shghtly diverging behind 

 Antennae long and slender; scapes scarcely curved at the base; 

 middle funicular joints more than 1^ times as long as broad. Thorax 

 long and narrow, in profile very low; pro- and mesonotum much de- 

 pressed, mesoepinotal constriction shallow and very long at the bottom, 

 Epinotum with straight, horizontal, basal surface, nearly twice as 

 long as the very sloping declivity. Seen from above the pronotum is 

 as long as broad, mesonotum nearly twice as long as broad. Petiole 

 narrow, thick at the base, with sharp horizontal border, and both the 

 anterior and posterior surfaces, but especially the latter, distinctly 

 flattened, so that the segment is cuneate in profile. Gaster small. 

 Legs long and slender. 



Opaque, finely shagreened; even the mandibles and frontal area 

 only slightly lustrous; the former finely and densely striated and 

 coarsely punctate. Head behind with a bronzy or glossy surface. 



Hairs white, sparse, pointed on the upper surface of the head, 

 obtuse on the gaster; absent on the gula, petiole, and upper surface 

 of the thorax. Legs with only the series of oblique bristles on the 

 flexor surfaces of the tibiae. Pubescence grayish, fine and rather 

 dense, covering the whole surface of the body and appendages, long- 

 est on the gaster. 



Dull reddish yellow; gaster, posterior half of head above, terminal 



