258 



WHEELER. 



nearly as long as their distance from the anterior border, a little in 

 front of the middle of the head. Carina of cheeks very prominent, 

 forming a strong, rectangular tooth. Postocular carina absent. Occi- 

 pital border of head marginate, the margination surrounding the 

 inferoposterior corners and running forward on each side of the gula 

 to the level of the posterior orbits. Mandibles triangular, deflected, 

 with concave external and finely denticulate apical borders. Frontal 

 carinse rather far apart, suberect, feebly emarginate but not truncate 

 behind before they meet. Antennae rather stout; scapes a little 

 longer than half the head, gradually incrassated towards the tip; 

 funicular joints 1-9 distinctly broader than long, tenth joint not longer 

 than broad, terminal joint pointed, nearly as long as the three pre- 

 ceding joints together. Thorax subrectangular, nearly twice as long 

 as broad, as broad through the pronotum as through the epinotum, 

 very feebly narrowed in the middle, in profile evenly convex above, 

 epinotal^declivity flat, very abrupt. There are marginations on the 



"^^^^r^toninxr:-^ 



Figure 15. Phyracaces larvatus sp. nov. Worker, a, dorsal view of body, 

 b, antenna of same. 



anterior and lateral borders, between the epinotal base and declivity, 

 along the sides of the latter and extending down the prosterna. Above 

 the epinotum bears a pair of minute teeth. Petiole slightly nar- 

 rower than the epinotum, broader than long, as broad behind as in 

 front, with rounded sides, rather sharp, flattened, posterior teeth and 

 concave anterior border. The anterior and lateral borders are 

 marginate. In profile the dorsal surface is feebly convex, the anterior 

 surface vertical and truncated, and there is a small, translucent, 

 backwardly directed tooth on the anteroventral surface. Postpetiole 

 decidedly broader than the petiole, a little broader than long, broader 

 in front than behind, separated by a strong constriction from the 

 gaster; its anterior corners are rounded and flattened, its sides straight, 

 its anterior and posterior borders are concave, its anterior and lateral 

 borders sharply marginate. First gastric segment broader than the 



