Pheidole rectiluma ^HNS new species

Types Mus. Comp. Zool. Harvard.

Etymology l rectiluma ^HNS, upright thorn, referring to the propodeal spine.

diagnosis Similar in various traits to the bilimeki ^HNS, floridana ^HNS, hazenae ^HNS, rectisentis ^HNS, rectispina ^HNS, rectitrudis, sospes ^HNS, and stomachosa ^HNS, differing as follows.

Major: shallow antennal scrobe present; mesonotal convexity well developed, and angulate in dorsal-oblique view; propodeal spines almost half as long as propodeal basal face and nearly vertical to it; pronotum in dorsal-oblique view weakly bilobate; postpetiole from above diamond-shaped; dorsal surface of head and all of mesosoma foveolate and opaque; anterior half of central strip of first gastral tergite shagreened.

Minor: head quadrate in side view; occiput broad and weakly concave; propodeal spines vertical to propodeal basal face; postpetiolar node in side view suppressed; all of head and mesosoma foveolate and opaque; anterior half of central strip of first gastral tergite shagreened.

Measurements (mm) Holotype major: HW 0.94, HL 1.00, SL 0.50, EL 0.12, PW 0.44.

Paratype minor: HW 0.48, HL 0.54, SL 0.42, EL 0.08, PW 0.30.

Color Major: concolorous light brown.

Minor: concolorous medium brown.

Range Known only from the type locality.

Biology The type colony was collected in tall cloud forest.

Figure Upper: holotype, major. Lower: paratype, minor. MEXICO: Rancho del Cielo, Sierra de Guatemala, Tamaulipas, 1070 m (Cornell University Field Party, 1965). Scale bars = 1 mm.