MANN: THE ANTS OF BRAZIL. 455 
the middle of the sides of head. Mandibles with two large apical 
teeth and several fine ones basally. Anterior border of -clypeus 
broadly rounded. Lobes of frontal carinae large, flattened, sub- 
triangular, the carinae extending back as strong, converging ridges 
nearly to the occipital corners of the head. Antennal scapes dis- 
tinctly thickened apically, extending about one third their length 
past the occipital corners; funicular joints all distinctly longer than 
broad. Occipital angles with one large, double spine, and anterior 
to these several small conical tubercles. Preorbital carinae extending 
backward toward, but not reaching the occipital corners of the head. 
Vertex with distinct ridges, which converge posteriorly. Lateral 
spine of pronotum long and stout, the apex excised to form two blunt 
tips, the anterior of which is higher than the posterior. Median 
spines very short, conical. Inferior spine two thirds as long as lateral 
spines, stout, the apex broadly rounded. Mesonotum with two 
pairs of lateral, subequal, stout spines, about one third the length of 
the prothoracic spines, strongly denticulate. Mesoépinotal con- 
striction rather strongly impressed. . Epinotum with subequal base 
and declivity, meeting at obtuse angle; with a pair of short, blunt 
spines a little in front of the middle of base; apical spines short and 
conical. Petiole from alfove about as broad as long, very abruptly 
narrowed anteriorly into a short petiole; node with a pair of stout 
spines. Postpetiole as broad as long, twice as broad as petiole; 
the posterior border distinctly margined, with a flattened impression 
anterior to margin and the lateral borders with three strong tubercles, 
the two anterior short and triangular, the one posterior longer and 
blunt. 
Gaster suboblong, broadest behind the middle; first segment with 
prominent lateral ridge. Tubercles small, blunt, few in number. 
Legs long, rather slender, without tubercles. 
Mandibles faintly shining, with a few hairs; remainder of body 
opaque and finely granular. 
Hairs ferruginous, sparse, very short, and depressed, except on the 
ventral surface of gaster, where they are longer and suberect. 
Color ferruginous, the antennae and carinae of front and vertex 
darker. 
Described from workers taken on the trunk of a palm at Abunda, 
Rio Madeira. 
Most closely related to 7’. oetkeri Forel from Sao Paulo, but differing 
in the smaller size of the anterior pronotal spines, which in T. oetkeri 
are much longer than the posterior pair. 
