Polyrhachis angusta

This species nests in soil and is uncommon relatively to the morphologically similar P. ammon.

Identification
Kohout (1988)- This species stands close to Polyrhachis ammon, but is consistently separable by its distinctly slender, more gracile stature. The pronotum in dorsal view is almost quadrate, 0.7-0.8 times as wide as the head, with narrowly rounded shoulders, and the lateral margins distinctly sinuate behind. The propodeal spines are oblique to the main axis of the mesosoma in side view and slightly divergent from above. In P. ammon the pronotum is more or less transverse with the shoulders broadly rounded and the lateral margins narrowed posteriorly and almost straight in outline. The propodeal spines project horizontally, and are subparallel. The appressed pubescence in P. angusta is shorter and more dilute, and the pilosity distinctly longer, than in P. ammon.

Distribution
Patchily distributed from Eungella in northern Queensland to central New South Wales.

This taxon was described from Australia.

Nomenclature

 *  angusta. Polyrhachis ammon r. angusta Forel, 1902h: 524 (w.q.m.) AUSTRALIA. Combination in P. (Hagiomyrma): Forel, 1915b: 108. Raised to species: Kohout, 1988c: 431.