302 ANNALS NEW YORK ACADEMY OF SCIENCES 



behind, in front very densely and finely punctate or granular, sides also with 

 numerous small rounded foveolse ; sides of clypeus and inner borders of frontal 

 carinse with a few large piligerous foveolse. Thorax, petiole and legs more 

 finely, gaster more coarsely and transversely shagreened, also with small 

 transverse foveolse bearing the pubescence and large piligerous foveolse across 

 the middle and along the posterior border of each segment. 



Hairs and pubescence yellow, the former long, sparse and erect, confined to 

 the mandibles, clypeus, dorsal surface of head, thorax, border of petiole, gula 

 and both dorsal and ventral surfaces of the gaster. Pubescence sparse, espe- 

 cially on the gaster, but very distinct on the posterior portions of the head, 

 thoracic dorsum, scapes and legs. Middle and hind tibiae with rows of stiff, 

 graduated bristles on their flexor surfaces. There are a few short hairs at 

 the tips of the antennal scapes and at the femoro-tibial articulations. 



Head and antennal scapes black ; mandibles, clypeus, cheeks and antennal 

 funiculi often tinged with red. Thorax and legs brownish red or chestnut ; 

 gaster black, with dull brown posterior segmental margins ; base of first seg- 

 ment or the whole of the first and second segments red like the thorax. 



Worker minor. Length, 7-8.5 mm. 



Head longer than broad, not contracted but rounded behind the eyes, with 

 rather straight, subparallel sides. Clypeus and antennal scapes much like 

 those of the worker majoi", the scapes reaching nearly half their length beyond 

 the posterior cornei-s of the head. Thorax about as broad as the head, base of 

 the epinotum somewhat longer than the declivity. Petiole subeuneate, with 

 more convex posterior surface and blunter border than in the worker major. 



Sculpture, pilosity and color much as in the worker major, but gaster not 

 red at the base. 



Female. Length. 14—16 mm. 



Head similar to that of the worker major but proportionally longer and 

 -narrower behind, with more nearly parallel sides. Thorax about as broad as 

 the head. Epinotum with short, convex base and much longer, steep and 

 slightly concave declivity. Petiole rather high, thick below, compressed aute- 

 Toposteriorly above, with sharp border. Wings long (16-17 mm.). 



Difliers from the worker major in sculpture to the extent of having the 

 thorax, gaster, legs and lower lateral borders of the head shining. 



Pilosity. pubescence and color much as in the worker major, but the meso- 

 notum, scutellum and metanotum black and the pronotum, pleurae, tibiae and 

 femora sometimes infuscated. Gaster frequently red at the base. In some 

 specimens, the whole of the thorax and the legs are very dark brown or black. 

 Wings suffused with brown ; veins and stigma light brown. 



Male. Length, 8-11 mm. 



Head somewhat longer than broad, with large, convex eyes, broader and 

 rounded postocular region and concave cheeks. Clypeus carinate, with broadly 

 rounded anterior border. Mandibles edentate. Antennal scapes slender, 

 terete, not flattened at the base. Thorax robust ; epinotum like that of the 

 female. Petiole very low and thick, its upper border transverse, blunt, some- 

 times with a broad but shallow excision. 



