338 bulletin: museum of comparative zoology. 



5. Inner edge of mandibles with a broad, blunt thickening. (New Guinea). 



mandihularis Viehmeyer. 



Inner edge of mandibles swollen apically, but the swollen part continuous 

 with the blade 6. 



6. Epinotal spines as long as the declivity and acute (Santa Cruz). 



ynodesta Mann. 

 Epinotal spines very short and not acute. (Solomons). 



viodesta subsp. subarmata Mann. 



66. Pristomyrmex pegasus, sp. nov. 



Worker. Length 1.75 mm. 



Head, including mandibles, a little longer than broad, with slightly convex 

 sides, broadly rounded corners and nearly straight occipital border. Mandi- 

 bles strongly curved, their basal borders bluntly dentate anterior to middle, 

 blades acutely 4-dentate. Clypeus concave; with a very short carina basally ; 

 anterior border bearing a tooth at each side and feebly bisinuate but not 

 toothed at middle. Antennal scrobes strong, extending two thirds the dis- 



FiG. 27. — Pristomyrmex pegasus Mann. Worker. Lateral view of thorax and petiole. 



tance to occipital corners. Antennal scapes not attaining occipital corners; 

 funicular joints two to seven a little broader than long; terminal joint slender, 

 a little longer than the two preceding taken together. Promesonotum robust, 

 broadly and transversely impressed in front, longitudinally impressed behind, 

 both impressions very shallow; sides of mesonotum elevated behind into thin 

 triangular teeth. Epinotum with equal base and declivity, the former trans- 

 versely carinate apically; spines strong, as long as declivity. Petiolar node 

 in profile higher than long, narrowly rounded above, anterior surface concave, 

 posterior convex; peduncle short, from above nearly twice as long as broad. 

 Postpetiole rounded, in profile higher than long. 



Shining. Mandibles coarsely, sparsely punctate. Head and thorax 

 foveolately punctate, the punctures being coarser and more abundant on the 

 head; clypeus subopaque, denselj^ punctulate; scrobes transversely carinate 



