wheeler: mtrmicine ants from brazil. 491 



Opaque; with only the gaster, mesopleurae, and legs smooth and 

 shining. Head densely and uniformly punctate; thorax, petiole 

 and postpetiole coarsely punctate-rugulose; sides of mesonotum above 

 irregularly and longitudinally rugose. Gaster with short longitudinal 

 rugae at the base. 



Hairs pale yellowish, very sparse, slender and rather short and 

 inconspicuous on the body. Flagelliform hairs on the thorax feebly 

 developed. Hairs on the legs delicate, appressed. 



Black; thorax and pedicel dark brown; mandibles, antennal scapes, 

 first funicular joint and legs piceous, tibiae and femora darker in the 

 middle. Wing membranes, stigma, and veins distinctly paler than in 

 the female. 



Described from three workers, three females and two males belong- 

 ing to the same colony: Cotype M. C. Z. 9039. 



This singular ant belongs to the tribe Dacetoniini and is evidently 

 closely related to the species of Strumigenys, Epitritus, and Penta- 

 struma but differs greatly from these and all the other known mem- 

 bers of the tribe in the structure of the head, which recalls that of the 

 Cryptoceriini, though the eyes in this tribe are behind and not 

 beneath the deep antennal scrobes. 



