424 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
lel behind. Antennae rather stout, the scapes slightly thickened 
towards their tips; second to fourth funicular joints somewhat more 
slender but scarcely longer than the antepenultimate joints. Mazxil- 
lary palpi moderately long. Pro- and mesonotum, especially the 
latter, rather convex; mesoépinotal constriction rather deep; epino- 
tum in profile with subequal base and declivity, both straight and 
forming a large obtuse angle with each other. Petiole rather narrow, 
thick at the base with convex anterior and flat posterior surface and 
very blunt border, which is rounded and entire when seen from behind. 
Gaster rather large. Legs moderately stout. 
Surface of body distinctly shagreened, shining; clypeus and man- 
dibles densely longitudinally striate, the latter subopaque and also 
sparsely punctate. Frontal area very smooth and shining. 
Hairs short, stout, obtuse, pale yellow, abundant, and erect, covering 
the dorsal and gular surfaces of the head, the thorax, fore coxae, 
petiole, and gaster; absent on the cheeks and pleurae. Pubescence 
rather sparse on the gaster, but slightly dimming the shining surface, 
shorter and less conspicuous on the head and thorax. Femora and 
tibiae with a row of hairs on the flexor surfaces; tibiae also with a few 
short subappressed hairs near the base on the extensor surface. 
Light ferruginous red; mandibles a little darker; gaster if anything 
a little paler and more yellowish than the thorax. 
Mae. Length 7 mm. 
Mandibles broad, edentate. Head, excluding the mandibles, as 
broad as long, with convex, broadly rounded posterior border and 
much rounded posterior corners, short cheeks and very large, convex 
eyes. Clypeus sharply carinate, with entire, broadly rounded ante- 
rior border. Thorax and gaster slender. Petiole low and transverse, 
very thick and very bluntly rounded above; seen from behind its 
summit is slightly impressed in the middle. Genitalia with the tips 
of the stipes projecting beyond the volsellae and sagittae. 
Surface of body, including the head and thorax as well as the 
gaster, shining; mandibles and clypeus more opaque; frontal area 
smooth and shining. 
Hairs and pubescence grayish, more abundant than in the worker, 
the hairs of the same length, but the pubescence longer. Eyes and 
scapes hairless; legs with only a row of erect hairs on the flexor 
surfaces of the tibiae and femora. Pubescence on the legs much 
shorter than on the body. 
Black; genitalia fuscous; tips of mandibles and legs beyond the 
tips of the coxae, yellow; last tarsal joint on each foot and basal por- 
tion of femora blackish. Wings grayish hyaline, the veins and stigma 
both of the same brown tint. 
Type LocaLity.— Colorado: Georgetown, (P. J. Schmitt). 
Alberta: Medicine Hat (J. C. Bradley). 
