Pheidole beloceps ^HNS new species

types Mus. Comp. Zool. Harvard.

etymology Gr beloceps ^HNS, arrow-headed, referring to the elongate and vertically thin head capsule.

diagnosis A small, yellow species whose major has an elongated head, the dorsal surface of which, with the exception of the midclypeus and frontal triangle, is completely foveolate and opaque; the rest of the cephalic sculpturing comprising longitudinal carinulae confined to the anterior half of the capsule; antennal scrobe absent; thick long, vertical propodeal spines are present, thin tips turning slightly forward in side view; small, subangulate mesonotal convexity present, and postpetiolar node conulate. Similar to charazana ^HNS, longinoi ^HNS, neolongiceps ^HNS, and prolixa ^HNS, but differing from each in various combinations of the above traits, and other traits, as illustrated.

Measurements (mm) Holotype major: HW 0.74, HL 0.96, SL 0.30, EL 0.06, PW 0.42. Paratype minor: HW 0.40, HL 0.48, SL 0.36, EL 0.04, PW 0.26. color Major: body dark yellow, appendages medium yellow. Minor: concolorous medium yellow.

Range Costa Rica.

Biology Found in leaf litter of lowland rainforest; workers were attracted to baits (Longino 1997).

figure Upper: holotype, major. Lower: paratype, minor. COSTA RICA: 4 km east of Turrialba, Cartago, 550 m (J. T. Longino). Scale bars = 1 mm.