432 bulletin: museum of comparative zoology. 



Head, mandibles, antennae, body, and legs with rather abundant 

 long silky pile. 



Color dark reddish brown, gaster, epinotum, and a spot on the 

 vertex much darker than the rest. 



Worker. Length 2 mm. 



Head, excluding mandibles, a little longer than broad, as broad in 

 front as behind, with moderately convex sides and nearly straight 

 occipital border. Mandibles long and slender, with long apical and 

 subapical teeth. Clypeus convex, flattened anteriorly, the border 

 concave at middle. Antennal scapes scarcely surpassing the occipital 

 corners ; all the funicular joints longer than broad. Eyes little convex ; 

 situated at middle of sides of head. Structure of thorax and abdomen 

 similar to that of soldier. Sculpture and pilosity similar to that of the 

 soldier, but the mesonotum is more closely punctate. 



Color dark reddish brown throughout. 



Described from soldiers and workers taken at Madeira-Mamore 

 Camp 39. The strongly prolonged sides of the pronotum, which, 

 with the mesonotum, forms a diagonal quadrangle from above, is very 

 characteristic. Both soldier and worker are very brightly shining, 

 with the exception of the epinotum. The punctation of the head and 

 especially that of the mandibles is coarse. 



82. Plieidolc {Pheidolc) carapuna, sp. nov. 

 Plate 3, fig. 22. 



Soldier. (Plate 3, fig. 22). Length 3.24 mm. 



Head, excluding mandibles, one and a fourth times as long as broad, 

 as broad in front as behind, with slightly convex sides and deeply, 

 narrowly excavated border. Mandibles long and thick, the blade 

 with a large subapical tooth, a large tooth near base and feeble denticles 

 between. Clypeus depressed at sides and anteriorly, with a strong, 

 narrow carina at middle and one on each side, the border rounded. 

 Frontal carinae extending about half as far as the tips of antennal 

 scapes. Eyes small, flat, located at anterior third of sides of head. 

 Antennal scape slightly bent at base, thickened at apex, extending 

 half the distance to occipital corners. Funiculus short, the first joint 

 three times as long as thick; joints 2-8 as broad as long; club as long 

 as the rest of the funiculus with the first two joints subequal, apical 

 joint longer than the two preceding, connate. Pronotum and mesono- 

 tmn in profile rounded, the sides of the former extended at the sides 



