Mandibles smooth and shiny, antennal scapes short, anteroventral subpetiolarprocess square cut. Pronotal and propodeal sutures absent dorsally. Anterior margin of anterior apron of clypeus straight or shallowly concave, terminating laterally in sharply rectangular corners. Petiolar node longitudinally costulate; when viewed from the side it appears low and rectangular. Anterior face of node without transverse costulae. Declivitous face of propodeum with longitudinal parallel costulae. Meso-metapleural suture well-impressed.

Promesonotal suture absent; scapes surpass margin of vertex when laid back; mandibles smoothly curving such that basal and apical margins form a continuous convexity; head in back of antennal insertions black or nearly so; mandibles straw yellow, contrasting sharply with black of cranium; mesosoma, node and gaster varying from black to yellowish-red; costulae of posterior face of propodeum longitudinal; eyes relatively large and elongate.

My collection includes two distinct groups. One group (shown left) is larger with the mesosoma the same dark color as the head. This group was collected in the canopy. The second group is slightly smaller, with the mesosoma varying frpm a yellow/orange color to brown (sometimes on the same specimen). Head is still black. All of these specimens were collected from a pitfall trap.

Pronotum separated from remainder of mesosoma by a very distinct suture, completely breaking the sculpture; anteroventral process of petiole square-cut; petiolar node erect, in side view the posterodorsal angle not very much more sharply rounded than anterodorsal angle, and not overhanging posterior face. Mandibles triangular and striate. Antennal scapes distinctly surpassing margin of vertex.

Lattke synonymized curtula and wheeleri under striatula. Longino observed distinct differences between the two and kept them separate. In my collection, I have put all specimens, whether or not the dorsal face of propodeum is somewhat differentiated from the mesonotum or not, under striatula. In addition, all of my specimens appear to have the anteroventral process of the petiole square-cut (as in image to left).

Mandibles triangular and distinctly striate. Antennal scapes very long, clearly surpassing the margin of the vertex by a large margin. Anteroventral subpetiolar process not square cut, posterior edge somewhat rounded. Pronotal costulae semi-circular, propodeal costulae longitudinal, metanotal costulae transverse (see below)

I thought at first that this was bisulca, but now believe that what I thought were the pronotal and propodeal sutures, are simply the sculpturing. I believe it is in the striatula group.