150 Zoologica: N. Y. Zoological Society [HI; 4 



middle, the anterior border transverse, entire. Antennal scapes 

 extending only very slightly beyond the posterior corners ol 

 the head. Thorax shaped somewhat as in the soldier, but the 

 upper surface of the pro- and mesonotum more flattened. Epino- 

 tum longer than broad, with very minute, acute teeth. Petiole, 

 postpetiole, gaster and legs resembling those of the soldier. 



Mandibles smooth and shining, sparsely and indistinctly 

 punctate. Clypeus, head, thorax, petiole and postpetiole sub- 

 opaque, finely, densely and uniformly punctate ; postpetiolar node 

 slightly shining, gaster and legs very smooth and shining. 



Pilosity like that of the soldier. 



Brownish yellow; mandibles, appendages and gaster paler, 

 yellow ; the gaster without dark fasciae. 



Female (dealated). Length: 2.5 mm. 



Head subrectangular, a little longer than broad, a little nar- 

 rower in front than behind, with straight sides and posterior 

 border. Frontal carinae and antennal scrobes as in the soldier. 

 Antenna longer, the scapes reaching to the posterior third of the 

 lateral borders of the head. Upper surface of head convex, 

 without vertical impression. Ocelli rather far apart. Thorax 

 elliptical, as broad as the head, the mesonotum and scutellum 

 flat above. Epinotum very small and sloping, with small teeth. 

 Petiole and postpetiole much as in the soldier ; gaster larger and 

 more elongate. 



Sculpture, pilosity and color as in the soldier. There is a 

 black spot on the ocellar triangle and the brown fasciae on the 

 gaster are broader and darker. Wing insertions blackish. 



Described from specimens froni a single colony with brood, 

 taken August 23 at Kartabo from a petiole of a small Tachigalia. 



This species is very peculiar on account of its small size 

 and the antennal carina of the soldier and worker. In the latter 

 particular it seems to approach Ph. scrobifera Emery of Costa 

 Rica, but this species is decidedly larger, with much longer 

 epinotal spines, quite different sculpture, etc. 



