Pheidole rotundiceps ^HNS new species

Types Mus. Comp. Zool. Harvard.

Etymology L rotundiceps ^HNS, round head.

diagnosis A very large, yellow member of the tristis ^HNS group, similar to pepo ^HNS, sphaerica ^HNS, and subsphaerica ^HNS, easily distinguished by the following traits.

Major: head capsule nearly circular in outline; the entire outline of the head in full-face view almost completely devoid of pilosity; entire head posterior to the level of the eye sparsely covered by rows of elongate foveae; postpetiolar node seen from above bluntly cone-shaped.

Measurements (mm) Holotype major: HW 2.34, HL 2.24, SL 1.10, EL 0.30, PW 0.98. color Major: concolorous light reddish yellow (light "orange").

Range Known only from the type locality.

Biology Unknown.

Figure Holotype, major. ECUADOR: Tinalandia, 16 km southeast of Domingo de los Colorados (Stewart B. and Jarmila Kukalova-Peck). Scale bar = 1 mm.