262 WHEELER. 



large and swollen, longer than the two preceding joints together. 

 Thorax subrectangular, about twice as long as broad, as broad through 

 the pronotum as through the epinotum, distinctl^\' narrowed in the 

 middle, with concave mesopleurie ; anterior border straight and 

 transverse, submarginate; prosterna, lateral borders and boundary 

 between the epinotal base and declivity marginate, sides of the latter 

 scarcely submarginate. Epinotum above with a pair of distinct 

 teeth. Petiole nearly as long as broad, rectangular, marginate only 

 on the sides, its anterior corners sharp, its posterior corners forming 

 short, acute, flattened teeth, its anterior border feebly concave. In 

 profile the dorsal surface is rather flat, the anterior surface very abrupt, 

 forming less than a right angle with the dorsal surface, the posterior 

 surface sloping, the ventral surface with an acute, translucent, back- 

 wardly directed tooth. Postpetiole of much the same shape as the 



Figure 17. Phyracaces binodis Forel. Worker, a, dorsal view of boch^, 

 b, antenna of same. 



petiole l)Ut somewhat longer, though not broader and with the an- 

 terior corners less acute; it is very strongly constricted ofP from the 

 first gastric segment and has the anterior and lateral borders margi- 

 nate. First gastric segment broader than the postpetiole, longer than 

 broad, broader behind than in front. Pygidium feebly impressed on 

 the dorsal side, bordered with minute spinules. Legs rather slender, 

 coxse of hind pairs with an erect, translucent lamella at the tip on the 

 inner side. 



Smooth and shining; mandibles coarsely punctate; upper surface 

 of body with rather evenly distributed, coarse, piligerous punctures. 



Hairs delicate, whitish, rather long, pointed, erect, covering the 

 body and appendages, somewhat shorter and more oblique on the 

 latter. Pubescence very feebly developed, distinct only on the coxse 

 and antennal scapes. 



Black; mandibles, antennae, front, cheeks, legs including coxse, 

 pygidium and incisures of the abdomen on the ventral side reddish 

 brown. 



