Tetramorium diligens

Nothing is known about the biology of .

Identification
Bolton (1977) - This distinctive species appears closest related to Tetramorium carinatum but in that species the head is broader, the scapes shorter, the integument more densely sculptured and the meta pleural lobes are dentiform.

Two other New Guinea species, Tetramorium bicolor and Tetramorium tricarinatum, have the same distinctive coloration as diligens, but both of these species belong to the bicarinatum-group and hence have 12-segmented antennae and a dentiform sting-appendage.

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

Nomenclature

 *  diligens. Myrmica diligens Smith, F. 1865: 73 (w.) NEW GUINEA. Combination in Xiphomyrmex: Donisthorpe, 1932c: 473; in Tetramorium: Bolton, 1977: 87. Senior synonym of diligentissima: Bolton, 1995b: 407.
 * diligentissima. Pheidole diligentissima Dalla Torre, 1892: 90. [Unnecessary replacement name for diligens Smith, above.] Junior synonym of diligens: Bolton, 1995b: 407.

Worker
Bolton (1977) - TL 3.8-3.9, HL 0.92-0.94, HW 0.74-0.78, CI 80-83, SL 0.96-1.00, SI 128-129, PW 0.62-0.66, AL 1.12 (2 measured).

Mandibles very feebly striate; antennal scapes long, SI> 120. Frontal carinae extended back only tothe level of the posterior margin of the eye and terminating in this vicinity. Scrobes virtually non-existent, merely a very shallow impression below the frontal carinae. Propodeal spines stout and very long, the metapleural lobes very reduced, low and broadly rounded, not dentiform, scarcely or not visible when the alitrunk is viewed in profile. Peduncle of petiole long, the node high and narrow in profile with a concave anterior face (Fig. 4). Dorsum of head mostly unsculptured, with one or two short rugulae between the frontal carinae, the median cephalic carina fading out posteriorly. Vertex unsculptured, smooth and shining. Dorsal alitrunk with a few coarse and widely spaced rugae, pedicel and gaster unsculptured. Bicoloured, the head and gaster blackish brown, the alitrunk, legs and antennae yellow. In the Syntypes the petiole is yellow-brown, the postpetiole darker, almost as dark as the gaster.

Type Material
Bolton (1977) - Syntype workers, New Guinea (A. R. Wallace) [examined].

Myrmica diligens

One worker syntype in, one worker syntype in. Both labelled “N” (= New Guinea).