MANN: THE ANTS OF BRAZIL. 413 



convex; clypeus prolonged at middle, the apical portion narrowly 

 rounded; frontal carinae above antennal lobes slightly diverging out- 

 wardly. Mandibles triangular; about | as long as head, the blade 

 with twelve distinct teeth. Carinae on cheeks very distinct. Anten- 

 nae slender; the scapes extending one third their length past occipi- 

 tal corners; funicular joints all longer than broad, increasing in size 

 toward the tip. Prothorax transverse, longitudinally carinate at 

 middle, flattened above; sides strongly margined, in profile slightly 

 convex. Mesonotum circular, with a median, longitudinal carina, 

 on either side of which the surface is depressed; in profile flat. Epi- 

 notum in profile evenly convex, with no appreciable angle between 

 base and declivity; anterior portion rounded above and at sides; 

 declivity margined, with an indistinct tubercle at middle of margin; 

 surface flat. Petiole as broad as long, broadest behind, sides evenly 

 convex; posterior margin straight, in profile three fourths as thick 

 as high, with anterior surface horizontal from base to two thirds the 

 distance to apex, then inclined to apex; posterior surface with a disc 

 at middle, rounded on the sides. Gaster cylindrical, as long as thorax 

 and petiole together. 



Somewhat shining. Mandibles finely striate. Head foveolately 

 punctate; thorax and node finely punctate, the epinotal pleurae strio- 

 late. 



Head, thorax, and node with sparse, fine, appressed pubescence 

 and scattered, erect hairs. Posterior surface of node smooth and 

 shining. Gaster rather densely pubescent and with scattered, long 

 pile. Legs sparsely pubescent and pilose. 



Color black; antennae, mandibles, and legs brown. Pile and 

 pubescence silvery. 



Described from two workers taken at Abuna. 



31. Neoponera (Neoponera) crenata Roger subsp. moesta Mayr. 

 One colony was found at Porto Velho. 



32. Neoponera (Neoponera) stipitum Forel. 



A single worker from Camp 41, Madeira-Mamore R. R. agrees 

 very well with a cotype from Colombia in the Wheeler collection. 



