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. 



Female. 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, fiexuous, and sparse, confined to the pos- 

 terior portion of the pronotum 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. 



Male. 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 boi'der. Maxillary palpi 

 5-jointed. 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. 



