Original Description (poor translation from French; translated using Google)
Head oval, elongated, somewhat narrowed in the rear, but not contracted in the form of neck like in real Ischnomyrmex; the contour of the foramen magnum rim is only cutting edge. Mandibe large, unarmed on the majority of their board terminal arms only two teeth in front, whose apical assex long, and sometimes showing traces of one or two denticles very apparent. They are shiny, nettements and longitudinally striated, with a few scattered points, including a range is seen along the border terminal. Head strong enough, the intervals are punctuated densely-crosslinked, this punctuation is not on epistome, which is simply ride; frontal area very finely and longitudinally wrinkled; back in the vertex and occiput, sculpture clears leaving nothing for a reticulation fine and very superficial. Eyes of medium size, situated just forward of mid-lateral edges. Antennae long and slender, scape significant overstatements occiput; funiculus filiform, all items elongated, cylindrical, the first pilus long as the last to offer no evidence of heavy or separate club. Thorax hail, lengthens, its dorsal profile arched concave pronotum shining, very finely and very superficially. Reticule and the disc of mesonotum; ratings latter and metanotum very strongly and transverse wrinkles metanotum is the weapon back in two long spines broad and reconciled to their base, acute at the extremities, slightly divergent, directed upward and above back or bend it slightly downwards, their range is smooth and shiny. Petiole extension, very superficially reticule and shining, his first article back in overcoming a tight knot and low; second article pyriform, much narrower in front than behind, where it is approximately as high, but much more wide as the node of the first article. Abdomen oval short, smooth and very shiny legs very long and slender. Fully a red-brown, darker on the head, mandibles, cooking and tired shins, hips and apical two-thirds of the abdomen from brown to dark brown, tarsi lighter. Pubescence zero, a yellowish hair, short and sparse, is scattered here and there on the body and the scape of antennae and legs, or it is a scarce and more oblique.
Long, 8-9 mill. Montezuma, Chihuahua, Mexico (Mr. Cockerell).