1903.] NATURAL SCIENCES OF PHILADELPHIA. 257 



than the terminal joint. Thorax long, rather robust, not much wider 

 in front than behind, without abrupt decUvity at the juncture of the 

 neck and pronotum, pro- and mesonotum convex; mesoepinotal con- 

 striction very deep and broad. Epinotal spinas small, not longer than 

 broad at the base, directed upward. Petiole from above nearly three 

 times as long as its greatest width which is in the middle ; in profile the 

 node is low and rounded above, the anterior slope very long, at first 

 nearly horizontal, then gradually ascending, the posterior slope shorter, 

 somewhat flattened; summit of node distinctly impressed or concave 

 when seen from behind; ventral surface of peduncle with a long but 

 not very prominent tooth. Postpetiole fully half again as broad as 

 the petiole, a little broader than long, nearly square, its anterior angles 

 prominent, its dorsal surface in profile very convex, especially in front. 

 Gaster rather large, of the usual shape. Sting well developed. Legs 

 robust. 



Mandibles longitudinally striated. Clypeus smooth, especially be- 

 hind, its sides longitudinally rugose. Head smooth and shining above 

 and behind, sparsely punctate and irregularly and delicately reticulate. 

 Antennal foveae with curved, parallel ruga%- front and cheeks with 

 straight rugae. Neck opaque and delicately rugose; pro- and meso- 

 notum shining, very finely and irregularly reticulate, pleurae, epinotum 

 and mesoepinotal constriction subopaque, coarsely reticulate-rugose; 

 in the constriction and on the meso- and metapleurae the rugae have a 

 distinctly longitudinal trend. Declivous surface of epinotum smooth 

 and shining. Petiole and postpetiole shining and finely reticulate 

 above, more opaque and reticulate-rugose on the sides. Gaster 

 smooth and shining, finely and irregularly reticulate. 



Hairs white, long and very abundant, obtuse but not clavate, erect 

 on the trunk, suberect on the legs and antennae. 



Black or rich dark-brown, mandibles, antennae, except the club, 

 frontal carinae, thorax, pedicel and legs yellowish-red or testaceous. In 

 some specimens the dorsal surface of the thorax and nodes is blackened, 

 while in others the whole of the thorax, nodes and legs is black except 

 the peduncle of the petiole and the tarsi and joints of the legs, which 

 are yellow. 



Female. — Length 3.5-4 mm. 



Apart from the usual sexual characters, differs from the worker 

 in having the lower surfaces of the head, thorax, pedicel and the legs 

 more yellowish. The smooth surfaces of the body are hardly reticulate. 

 Mesonotum adorned with a median brown blotch on its anterior half 

 and a large comma-shaped spot on either parapsis. Scutellmii, epi- 

 17 



