WHEELER: MYRMICINE 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. 
