Strumigenys incomposita

Identification
Bolton (2000) - Closest related to Strumigenys kakothema, but the latter is smaller, lacks longitudinal rugulae on the vertex and has a slightly longer preapical tooth. The two together are characterised within the ebbae-complex by their well-developed preocular impressions, denser than usual pilosity and convex inner mandibular margins. Although neither incomposita nor kakothema has a conspicuous lamella on the inner mandibular margin, both appear to be in process of developing one and can be described as incipiently lamellate. The margin, apart from being convex in full-face view, is sharp-edged and prominent, differentiated from the remainder of the mandible blade, although only weakly so.

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

Nomenclature

 *  incomposita. Strumigenys incomposita Bolton, 2000: 844, fig. 451 (w.) INDONESIA (Sumatra).

Worker
Holotype. TL 2.6, HL 0.76, HW 0.63, CI 83, ML 0.33, MI 43, SL 0.38, SI 60, PW 0.33, AL 0.69. With characters of ebbae-complex. Preapical tooth short-conical and very weakly recurved, its length distinctly less than half width of mandible at point where it arises; preapical tooth located at about midlength of narrowed apical section of mandible. Inner margin of mandible shallowly convex proximal of preapical tooth, sharp-edged but without a prominent translucent lamella. Outer margin of mandible straight from basal inflection to apicodorsal tooth. Preocular concavity in ventrolateral margin of head broad and shallow. Upper scrobe margins evenly divergent from frontal lobes posteriorly; outer arc of eye visible in full-face view. Vertex with longitudinal fine rugulae that diverge posteriorly, becoming weakly reticulate on occipital lobes. Dorsum of head in profile with short erect hairs along occipital margin and n u merous erect hairs anterior to this; anteriormost pair at about level of eye, well in front of highest point of vertex. Pronotum with two pairs of short standing hairs, located anterodorsally. Mesonotum with a single pair of short erect hairs. Katepistemum smooth, metapleuron with a smooth patch. Bullae of femoral glands present but inconspicuous on middle and hind legs. Lamella on propodeal declivity with posterior (free) margin shallowly concave; propodeal teeth very short. Disc of postpetiole smooth. Standing hairs on first gastral tergite simple.

Paratype. TL 2.6, HL 0.75, HW 0.62, CI 83, ML 0.32, MI 43, SL 0.38, SI 61, PW 0.33, AL 0.70.

Type Material
Holotype worker, Indonesia: Sumatra, Jambi, Mt Kerinci, 1750-1850 m., 11-12.xi.1989, #11 (Agosti, Lobl & Burckhardt). Paratype. 1 worker with same data as holotype.