Carebara diversa macgregori

Identification
Wheeler (1929) - This subspecies is quite unlike any of the other forms of diversus in the opacity of the body, dark color and greatly reduced pilosity. It probably represents a local, insular race.

Distribution based on Regional Taxon Lists
Indo-Australian Region: Philippines.

Nomenclature

 * . Pheidologeton diversus subsp. macgregori Wheeler, W.M. 1929g: 50, fig. 6 (w.) PHILIPPINES (Samar I.).
 * Type-material: 1 syntype large worker, 9 syntype minor workers.
 * Type-locality: Philippines: Samar I. (R.C. McGregor).
 * Type-depository: MCZC.
 * Combination in Carebara: Fischer, et al. 2014: 71.
 * Subspecies of diversa: Santschi, 1933d: 1; Chapman & Capco, 1951: 159; Baltazar, 1966: 257; Ettershank, 1966: 119; Bolton, 1995b: 333.
 * Distribution: Philippines (Samar).

Worker
Major Length 10 mm.

Resembling Carebara diversa philippina but distinct in the following characters: Posterior third of the head more flattened and the anterior corners more thickened and turned outward so that the cheeks are distinctly concave. Thorax and pedicel opaque, the mandibles, clypeus, a small area on the mesonotum and scutellum, the upper surface of the postpetiole, which is grooved in the middle above and appears somewhat bituberculate, the gaster and legs shining. The rugae on the head are arranged much as in philippina but are finer and denser, so that the surface they cover is rather opaque. The transverse rugae on the vertex are sharp but less numerous and those on the occiput are very fine and diverge to the corners of the head. The three smooth areas on the front are much more restricted and rather finely punctate. Pronotum coarsely, transversely rugose; mesonotum finely striate and sparsely punctate; scutellum more coarsely punctate-rugulose. Epinotum transversely rugose at the base, the declivity regularly and finely reticulate-rugulose. Petiole and postpetiole, except the smooth upper surface of the postpetiolar node, densely and finely punctate and loosely rugulose. Gaster sharply, densely and uniformly puuctate.

Pilosity almost lacking. There are only a few erect hairs on the front of the head and on the venter. Scapes with only one or two hairs; those on the appendages short and appressed.

Dark brown; mandibles, clypeus, gaster and median portion of head almost black; antennae and legs slightly paler and more reddish; borders of gastric segments golden yellow.

Minima Length 2.3-2.5 mm.

Resembling the minima of the other forms of diversus but with the meso-and epinotum decidedly opaque and more sharply reticulate. Mandibles opaque, longitudinally striate. The sparse long hairs almost lacking on the body, appressed on the appendages. Castaneous brown; head, scapes, gaster and middle portions of femora and tibiae darker; remainder of legs, fnniculi and tips of scapes paler, brownish yellow; mandibles and clypeus pale brown.

Type Material
Described from a single large worker which is practically a soldier, though it lacks the ocellus, and nine minimae taken by Dr. R. C. Mc Gregor on Samar Island, Philippines, "marching in a field and carrying seeds and beetles."