1920] Wheeler and Gaige — A Rare North American Ant 71 



Eyes very small, distinctly larger, however, than in E. ochracea, 

 saideri or darwini, at the anterior sixth of the sides of the head. 

 Mandibles rather convex, with 6-7 distinct teeth, the apical some- 

 what coarser than the basal. Clypeus short, high and carinate in 

 the middle, especially behind, depressed on the sides, with broadly 

 rounded, entire anterior border. Frontal carinse small, flattened, 

 together forming a cordiform plate, divided by a narrow, im- 

 pressed, longitudinal line, which runs back onto the head as far as 

 the vertex in the form of a frontal groove. Antennal scapes not 

 reaching the posterior border of the head by a distance somewhat 

 greater than their greatest diameter; funiculi slender at the base 

 and enlarged at the tip, all the joints, except the first and last dis- 

 tinctly broader than long; last joint nearly as long as the three 

 preceding, which are subequal and form with it an indistinct club. 

 Pronotum as long as broad, somewhat depressed above, with 

 bluntly submarginate sides. Promesonotal and mesoepinotal 

 sutures pronounced, the mesonotum transversely elliptical, as 

 high as the pronotum and feebly convex in profile. Epinotum 

 shorter and narrower than the pro- and mesonotum together, 

 laterally compressed at the base, broader behind, its dorsal outline 

 in profile nearly straight, horizontal, lower than the mesonotum, 

 longer than the declivity into which it passes rather abruptly, the 

 latter feebly concave, distinctly marginate on the sides. Petiole 

 from above transversely elliptical, a little broader than the posterior 

 part of the epinotum, the node in profile broad below, a little lower 

 than the epinotum, narrowing upward, with very feebly concave, 

 steeply sloping anterior, flat, vertical posterior and evenly rounded 

 dorsal surface; the ventral surface with a low, rounded projection 

 in the middle. Postpetiole truncated in front, as long as, but dis- 

 tinctly narrower than the first gastric segment. Remaining seg- 

 ments rather small; sting well-developed, curved. Legs stout; 

 middle tibiae and metatarsi short and strongly bristly on tlieir 

 extensor surfaces. 



Mandibles smooth, shining, with a few sparse punctures, mainly 

 near the apical borders and some indi.sti.nct striic near the base. 

 Head opaque, very finely and densely punctate, so that it has a 

 velvety texture. Thorax less opaque, especially the epinotum, 

 and the fine punctures, especially of the latter, not so dense. Sides 

 of epinotum, petiole, gester and legs shining, with very fine and 

 still more distinctly separated punctures. 



