Acromyrmex (Moellerius) balzani Emery planorum ^HNS,

subsp. nov.

Worker: Length 2-7 mm. - Worker maxima: Head deeply incised, occipital angles rounded, with acute spine and about 5 low and inconspicuous tubercles. Antennal scapes reaching occipital angles. Dorsum of first gastric segment with large tubercles irregularly arranged but tending to be absent from the medial region, and a lateral region and tending to form lateral ridges. Head, except occipital region, sparsely rugulose. Thorax finely rugulose. Surface of body faintly pruinose. Hairs short, sparse, recurved. Ferruginous.

Described from a colony taken by myself about 17 kilometers north of Ciudad Bolivar, on the llanos of Venezuela, January 27, 1935.

This subspecies differs from the subspecies myersi ^HNS in having longer antennal scapes, in arrangement of gastric tubercles, in sparser pruinosity, and in brighter color.