MANN: THE ANTS OF BRAZIL. 469 
172. Azteca schumanni Emery subsp. dubia, subsp. nov. 
Plate 2, fig. 15. 
Worker major. (Plate 2, fig. 15). Length 2 mm. 
Head subquadrate, one and a third times longer than broad, slightly 
narrowed in front, with feebly convex sides, broadly rounded occipital 
corners and narrowly excavated border. Clypeus convex, the anterior 
border broadly bisinuate. Antennal scapes extending about two 
thirds the distance to occipital corners; strongly arcuate and thick- 
ened toward apex; funicular joints 5-10 as broad as long. Eyes at 
sides of head, well in front of the middle. Pro- and mesothorax as in 
A. schumanni. Epinotum in profile rounded; the posterior portion 
of base flattened. Node in profile twice as high as thick, evenly 
rounded above. Antennal scapes and tibiae without erect pile. 
Head, thorax, and abdomen with fine, long, appressed pubescence 
and sparse, short, erect hairs. 
Color fuscous, thorax lighter, gaster darker. 
Worker minor. Length 2 mm. 
Head longer than broad, the width at occiput equal to that at 
clypeus; sides slightly convex, posterior border very feebly concave. , 
Clypeus convex, the anterior border truncate at middle, slightly 
produced and rounded at corners. Eyes small, located in front of 
sides anterior to middle of head. Antennal scapes extending about 
two thirds the distance to occipital corners, funicular joints 6-10 as 
broad as long. Thorax and epinotum similar to that of the worker 
major, but the latter is somewhat flatter. Node and gaster as in the 
worker major. 
Subshining, finely punctate. Body above with sparse, short pile 
and pubescence. Antennae and legs pubescent, without erect pile. 
Color fuscous. 
Male. Length 3.5 mm. 
Head about as long as broad; sides and posterior border convex. 
Mandibles slender, acuminate. Anterior border of clypeus rounded. 
Eyes rather large and convex. Ocelli prominent, the lateral ones 
situated at opposite ends of a transverse elevated tubercle, which is 
rounded in front and behind. Antennae short and stout; first and 
second joints subglobose, transverse, the second the longest; third 
joint one and a half times longer than broad, very much thickened; 
joints 4-6 distinctly longer than broad, joints 7-12 proportionately 
shorter; apical joint one and a half times as long as penultimate. 
