Strumigenys lachesis

Identification
Bolton (2000) - A member of the argiola complex in the Strumigenys argiola group. This minute species is close to Strumigenys hirashimai but with the marked pilosity differences noted in the diagnoses. Apart from pilosity the apicodorsal mandibular tooth of lachesis is smaller and shorter than in hirashimai, and funicular segments 2 and 3 are much smaller and less conspicuous.

Distribution based on Regional Taxon Lists
Palaearctic Region: China.

Nomenclature

 *  lachesis. Pyramica lachesis Bolton, 2000: 389 (w.) CHINA. Combination in Strumigenys: Baroni Urbani & De Andrade, 2007: 122

Worker
Holotype. TL 1.5, HL 0.39, HW 0.36, CI 92, ML 0.12, MI 31, SL 0.17, SI 47, PW 0.24, AL 0.42. Apicodorsal tooth of mandible short and dentiform, not spiniform and no longer than apicoventral tooth. Mandible without preapical teeth. Dorsal surface and outer dorsolateral margin of mandible each with a longitudinal row of apically directed scale-like to spoon-shaped hairs that are decumbent to loosely appressed. Anterior clypeal margin with 6 elongate strap-like hairs that project anteriorly; the two pairs closest to the clypeal midline are shallowly curved away from the midline. Most hairs on leading edge of scape curved toward the base of the scape. Funicular segments 2 and 3 ( = antennal segments 3 and 4) very small, short and inconspicuous. Orbicular hairs present on dorsal surfaces of scape and all over the cephalic dorsum; those occurring medially on the clypeus are much smaller than those near its lateral or posterior margins. CI < 100. Mesonotum in profile not bulging posteriorly over base of propodeum. Dorsolateral margin of propodeum with 2-3 broadly spoon-shaped hairs that are strongly curved posteriorly; none on propodeal dorsum.

Type Material
Holotype worker, China: central Guangdong, Gutian, 3.iv.1997 (J. R. Fellowes).