Probolomyrmex bidens Brown 1975

Probolomyrmex bidens Brown, 1975 Probolomyrmex bidens Brown, 1975: 56. Holotype worker. Type-locality: Palni Hills, 10 km NW Kodaikanal, Tamil Nadu [Madras] India [MHNG]. Worker diagnosis. Posterior borders of head more pronounced, more nearly rectangular than in related species; posterior border straight or even feebly convex in full-face view. No eyes detected at 50 ×. Propodeal teeth fairly prominent, subrectangular. Petiolar node special in form with the sides ending behind in prominent triangular teeth. In dorsal view, the sharp posterior border is broadly excavated. The subpetiolar process is like that of P. greavesi, but is even deeper, with the posteroventral corner a little less sharply angled. Postpetiolar segment robust, rounded in front as seen from above. Larger punctures more numerous and more than usually distinct on head, mesosoma, and petiole; appressed pubescence also fairly distinct over most of body. Colour dark ferruginous, legs and antennae a bit lighter, more yellowish.” The queen and male castes of this species are unknown. P. bidens is relatively larger than the only other known Indian species P. procne with the following morphometric data in mm: TL 2.7, HL 0.62, HW 0.41, SL 0.41, WL 0.80, PRNW 0.33, PTL 0.31, PTW 0.23, CI 66, LPtI 83 (Brown 1975).