Pheidole glomericeps ^HNS new species

Types Mus. Comp. Zool. Harvard.

Etymology L glomericeps ^HNS, spherical head.

diagnosis Similar in various traits to exigua ^HNS, moffetti ^HNS, nana ^HNS, nuculiceps ^HNS, orbica ^HNS, rudigenis ^HNS, sculptior ^HNS, and styrax ^HNS, differing as follows.

Major: outline of head in full-face view circular; antennal scrobes present, anterior fourth of pronotal dorsum, as well as space between eye and antennal fossa, rugoreticulate; promesonotal profile elevated and strongly convex; mesonotal convexity subangulate in side view; petiolar node tapered at apex to a blunt point; postpetiole from above trapezoidal; almost all of mesosoma foveolate. Minor: eye small and elliptical; promesonotal profile semicircular; occiput broad and weakly concave; petiolar node tapers to point at apex; all of head and mesosoma foveolate.

Measurements (mm) Holotype major: HW 0.80, HL 0.80, SL 0.44, EL 0.10, PW 0.38. Paratype minor: HW 0.40, HL 0.44, SL 0.42, EL 0.04, PW 0.24. Color Major and minor: concolorous yellow.

range Known from the type locality and from near Turrialba, Cartago Prov., Costa Rica, 550 m.

Biology Collected at a bait in a subterranean trap (W. P. MacKay).

Figure Upper: holotype, major. Lower: paratype, minor. MEXICO: 10 km south of Palenque, Chiapas (William P. MacKay). Scale bars = 1 mm.