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 hilly country 
and is much rarer than any of the other varieties or subspecies. 
139. F. (N.) moxt Wheeler. 
F.. moki Wheeler, Bull. Amer. mus. nat. hist., 1906, 22, p. 343, 8. 
WorkKER. 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 slightly diverging behind 
Antennae long and slender; scapes scarcely curved at the base; 
middle funicular joints more than 14 times as long as broad. Thorax 
long and narrow, in profile very low; pro- and mesonotum much de- 
pressed, mesoépinotal 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 
