A NEW GENUS OF HYPOG.EIC ANTS FROM TEXAS. 139 



the middle, the latter towards their distal ends. Middle and hind tibiae 

 without spurs. Claws simple. 



Female. Very large as compared with the worker ; deeply colored. 



Head subquadrate, convex above ; posterior border slightly concave, 

 sides nearly parallel, posterior angles rounded. Eyes and ocelli rather 

 small, the former round and placed in front of the middle of the head ; 

 median ocellus depressed. Mandibles convex, with oblique 6-toothed blades, 

 clypeus short and broad, somewhat flattened in the middle, the teeth and 

 their longitudinal ridges on the anterior border obsolescent. Frontal car- 

 inae short, rather evenly diverging posteriorly, in front forming a slight fold 

 over the antennal insertion. Frontal area triangular, longer than wide, 

 continued back as a rather deep frontal groove as far as the anterior ocellus, 

 just in front of which it becomes somewhat broader. Antennae u-jointed ; 

 scape very short, not reaching the posterior orbit, distinctly incrassated. 

 Funiculus short and compact, with an indistinctly 3-jointed club, the pe- 

 nultimate joint of which is more than half as long as the terminal joint, the 

 antepenultimate nearly half as long as the penultimate and but little thicker 

 than the basal joints of the funiculus. Thorax of the usual structure; epi- 

 notum with a blunt tooth on either side continued downwards to the pos- 

 terior edge as a low, rounded ridge. Petiole seen from above not broader 

 than long, its base very shortly pedunculate ; anterior declivity long and 

 very convex, at the summit passing abruptly into the very concave posterior 

 declivity, so that the summit of the node forms a trenchant transverse 

 ridge ; lateral surface on either side longitudinally carinate, ventral surface 

 somewhat compressed and produced anteriorly into an acute median tooth 

 like that of the worker. Postpetiole in profile but little smaller than the 

 petiole, and when seen from above but little broader ; its anterior border 

 straight, its anterior angles rounded, its posterior border semicircular 

 and fitting back into a deep semicircular excision of the first gastric seg- 

 ment ; sides of the postpetiole carinate. Gaster large, fully two and one 

 half times as long as broad and but little broader that high. Anal opening 

 and sting inconspicuous, decidedly ventral in position. Legs rather short 

 and weak, the terminal joints of the tarsi more tapering than in the worker. 

 Wings of the usual form, long and well developed. Venation much like 

 that of Solenopsis, with well-developed radial, cubital and discoidal cell ; 

 the last larger than in Solenopsis and its opposite sides much more nearly 

 parallel ; external branch of cubital vein turning forwards and meeting 

 the costa some distance in front of the tip of the wing ; median vein and 

 internal branch of cubital reaching very nearly to the margin of the wing ; 

 posterior cross-vein short and perpendicular to the median and internal 

 veins. Pterostigma well developed. 



Male. Much larger than the worker but smaller than the female, deeply 

 colored. 



Head in proportion to the thorax much larger than in Solenopsis ; ex- 

 cluding the eyes distinctly broader than long, rounded behind. Eyes and 



