Pheidole medialis ^HNS new species

Types TNBio.

Etymology L medialis ^HNS, anatomically in center of a large species complex, from near the center of Costa Rica.

diagnosis Close to the widespread species radoszkowskii ^HNS, and distinguished from it by reduced sculpturing on the head and pronotum, and much broader mesonotal convexity and petiolar node viewed from the side.

Measurements (mm) Holotype major: HW 1.00, HL 1.08, SL 0.70, EL 0.18, PW 0.54.

Paratype minor: HW 0.46, HL 0.56, SL 0.64, EL 0.14, PW 0.30.

Color Major: light brown, rest of body dark yellow, appendages medium yellow.

Minor: gaster medium brown, rest of body and appendages brownish yellow.

range Known only from the type series.

Biology Unknown.

Figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: El Alto de Ochomogo, 5 km east of Tres Rios, Cartago Prov. (J. Welch). Scale bars = 1 mm.