482 BULLETIN: MUSEUM OF COMPARATIVE ZOOLOGY. 
behind, is entire and usually broadly rounded, or slightly produced 
upward in the middle. Gaster of the usual shape, legs rather long. 
Body delicately shagreened; head, thorax, and petiole subopaque 
or slightly shining; mandibles and frontal area more shining, the 
former striatopunctate, the latter rather smooth; gaster shining but 
more distinctly shagreened than the head and thorax. 
Hairs and pubescence yellowish, very sparse. There are a few hairs 
on the clypeus, mandibles, and sometimes on the front, and blunt scat- 
tered hairs on the gaster. Eyes hairless. Pubescence short and very 
dilute, most distinct on the gaster. Legs without erect hairs, invested 
with very fine, dilute pubescence. 
Deep red; gaster black, anal region reddish; mandibles, legs, vertex, 
funiculi and dorsal portions of thorax sometimes brownish or dark 
red. 
FemMaLe. Length: 9-11 mm. 
Head resembling that of the worker, but more flattened at the ver- 
tex, scarcely broader than the thorax. Petiole broader than that of 
the worker but similar in shape. 
Head and thorax somewhat more shining than in the worker; man- 
dibles superficially striated and coarsely punctate. 
Hairs tawny, long, coarse, flexuous, and sparse, confined to the pos- 
terior portion of the pronottim and the gaster. There are also two 
small tufts of these hairs on the mesonotum, and several on the scutel- 
lum and clypeus. The pubescence is even more feebly developed 
than in the worker, being almost absent on the gaster. 
Color like that of the worker, except that the gaster has a more 
reddish tinge and a yellow spot at the base of the first segment. Wings 
uniformly brown, with brown veins and stigma. 
Mate. Length 7.5-10 mm. 
Mandibles with broad blades, distinctly 4-toothed. Eyes large. 
Head broad behind, with straight posterior border and large posterior 
corners, narrow in front, with short, straight cheeks. Clypeus sharply 
carinate, with broadly rounded anterior border. Maxillary palpi 
5-joited. Thorax robust. Petiole a little higher than long, thick, 
with flattened anterior and posterior surfaces, and very blunt, entire 
superior border. 
Head, mandibles, thorax, and petiole subopaque; gaster shining. 
Mandibles coarsely striato-punctate. 
Hairs few and scattered, confined to the upper surface of the head 
and thorax. Pubescence long, grayish, conspicuous and rather dense 
on the head, thorax, and gaster. 
+ Black; mandibles, and antennae brown, genitalia brownish yellow; 
legs, including the coxae, light yellow. Wings brown as in the female, 
with brown veins and stigma. 
