I4O WILLIAM MORTON WHEELER. 



ocelli very large and prominent. Cheeks much longer than in Solenopsis. 

 Mandibles well developed, overlapping, with very oblique 4-toothed blades. 

 Clypeus about as long as broad, very conspicuously convex, hemispherical, 

 its anterior border somewhat truncated, without teeth. There is a small, 

 round, deep pit on either side near the base of the clypeus. Frontal groove 

 and carinse hardly developed. Antennae rather short, 13-jointed, of nearly 

 uniform thickness throughout except for the scape and second joint, the 

 former being somewhat thicker, the latter somewhat narrower than the 

 other joints ; scape and joints 3-13 cylindrical, more than twice as long as 

 broad ; second joint about half as long as any of the succeeding joints, of 

 the usual shape and not globose as in Solenopsis. Thorax large, with un- 

 armed epinotum or in some specimens with only blunt protuberances in 

 the place of the worker armature. Petiole hardly pedunculate, in profile a 

 little longer than high, its lower surface without a tooth, its node moderate, 

 with the anterior declivity longer and more uniformly sloping than the 

 posterior. Postpetiole shorter than the petiole but twice as broad, campan- 

 ulate, broadly open behind and conspicuously overlapping the first gastric 

 segment especially on the dorsal side. Caster elongate-elliptical, rather 

 pointed posteriorly, distinctly compressed dorsoventrally. Genitalia more 

 or less, in some specimens considerably, exserted. Legs rather long and 

 slender. Wings like those of the female. 



EREBOMYRMA LONGII sp. nov. 



Worker. (Figs, i and 2.) Length 1.5-2.25 mm. 



Varying from amber yellow throughout to pale brown ; only the teeth 

 and edges of the mandibles dark brown or black. 



Mandibles shining, somewhat striated, with coarse piligerous punctures. 

 Clypeus in the middle between the longitudinal ridges smooth and shining, 

 sides more opaque and rugose. Anterior angles of head and outer portions 

 of antennal foveae subopaque, traversed by regular and parallel longitu- 

 dinal rugae. Frontal area and upper surface of head smooth and shining, 

 covered with rather coarse piligerous punctures. There are a few longi- 

 tudinal rugae extending back from the frontal carinae half way to the pos- 

 terior border of the head. Sides and ventral surface of head opaque, reticu- 

 late-rugose. Antennal scape reaching half way to the poster or angle of 

 the head, slender at the base and somewhat thickened towards the apex. 

 Pro- and mesonotum smooth and shining, with indistinct piligerous punc- 

 tures. Mesopleuras and epinotum coarsely and evenly reticulate-rugose, 

 even to the tips of the teeth and the space included between them. Petiole 

 similarly, but somewhat less coarsely, reticulate-rugose, except on the upper 

 surface of the node which is smooth and shining. Postpetiole, gaster, legs 

 and antennae smooth and shining. 



Whole body covered with rather long and abundant pale yellow hairs 

 which on the mandibles, head and thorax arise from the punctures. These 

 hairs are longest on the clypeus and posterior segments of the gaster. 



