Pseudomyrmex nigropilosus

Distribution
This taxon was described from Costa Rica.

Nomenclature

 *  nigropilosus. Pseudomyrma nigropilosa Emery, 1890b: 62, pl. 5, fig. 24 (w.) COSTA RICA. [Also described as new by Emery, 1894k: 51.] Combination in Pseudomyrmex: Kempf, 1958f: 453. See also: Ward, 1993: 159.

Description
Ward (1993) - With the traits of the P. gracilis group (see couplet 6 of key) and the following more specific features. Head longer than broad (CI 0.84-0.90); anterior margin of median clypeal lobe convex, conspicuously protruding; dorsolateral margination of pronotum usually blunt; mesonotum more steeply inclined than basal face of propodeum; petiole relatively robust (PU 0.69- 0.77) with a short anterior peduncle; head and mesosoma densely punctulate to coriarious-imbricate, and subopaque; standing pilosity conspicuous on most of the body including the outer faces of the tibiae, consisting largely of black hairs, those on the petiole and Propodeum long (> 0.20 mm) and curved. Color varying from concolorous orange-brown to bicolored orange and black to (western Mexico) predominantly black with orange mottling on the head, mesosoma, and appendages.

Type Material
Ward (1993) - Syntype workers, Liberia, Costa Rica (A. Alfaro) [Examined].