Worker. Length 1 line. - Head and abdomen reddish-brown; antennae, mandibles, thorax and legs pale ferruginous; the head oblong, with a number of shallow depressions above; the lateral margins deeply contracted about the middle, opposite the eyes, the sides expanded and rounded before the contraction and nar- rowly margined behind it; the vertex emarginate behind. Tho- rax with depressions on the disk, rounded in front and obliquely truncate behind; a deep contraction between the meso- and me- tathorax, three obtuse teeth or spines on the margins on each side; the metathorax with a longitudinal depression in the centre; the legs elongate, without spines or hairs. Abdomen subglo- bose, widest towards the apex; the first node of the peduncle small and transverse, the second large, subglobose, and with a depression above; there is also a central depression at the base of the abdomen.
Hab. Santarem.
