412 bulletin: museuim of comparative zoology. 



and disc of epinotum transverse, on sides longitudinally oblique. 

 Node shining, with coarse, transverse striae, which extend around it, 

 broken only by the strong margin. Gaster sublucid; first segment 

 minutely punctate. 



Head and thorax with fine recumbent pubescence, and abundant, 

 scattered, erect pile. Node without pubescence, and with scarce 

 pilosity. Gaster with a dense mat of fine recumbent pubescence, and 

 abundant, scattered, erect pile. 



Femora and tibiae with short erect hairs, smooth and shining. 



Color black; mandibles, antennae, tibiae, and tarsi brown, femora 

 yellow. Pile and pubescence pale yellow. 



Female. Length 11 mm. 



Similar to worker. The eyes are small, ocelli minute. The thoracic 

 striae are proportionately much finer than in the worker, and trans- 

 verse. The declivity of the epinotum is abrupt, the base shallowly 

 margined; margin with fine teeth. Node as in worker. 



Pile and pubescence as in worker. Color black; legs, mandibles, 

 and extreme tip of antennae brown. 



Wings. Length 7.5 mm. Infuscated, veins and stigma fuscous. 



Described from one female from Porto Velho and several workers 

 taken on the Rio Madeira at Porto Velho, and Camps 39 and 41 on 

 the Madeira-Mamore R. R. This species in form is similar to N . 

 unidentata (Mayr), which was common in the same region, but the 

 very distinctive coarse sculpture of the head, thorax, and especially 

 of the node, and the denticulate margins of the epinotal declivity and 

 the posterior surface of the node, as well as the different nodal struc- 

 ture seem to constitute differences more than subspecific. 



29. Neoponera {Neoponera) villosa (Fabricius). 



Para, Manaos, Itacoatiara, Porto Velho, Abuna, and Camps 39, 41 

 Madeira-Mamore R. R., Brazil; and Abuna, Bolivia. 



This is one of the commonest ponerine ants of Brazil, and one of 

 the most widely distributed species, ranging from Texas to Paraguay. 



30. Neoponera (Neoponera) carinulata (Roger). 



Plate 1, fig. 10. 



Worker. (Plate 1, fig. 10). Length 8 mm. 



Head, excluding mandibles, scarcely longer than broad, very slightly 

 narrowed in front; occipital border nearly straight; sides feebly 



