Strumigenys trieces

Distribution
This taxon was described from Costa Rica.

Nomenclature

 *  trieces. Strumigenys trieces Brown, 1960b: 50, fig. 8 (w.) COSTA RICA. Combination in Pyramica: Bolton, 1999: 1673; in Strumigenys: Baroni Urbani & De Andrade, 2007: 129. See also: Bolton, 2000: 194.

Worker
Bolton (2000) - TL 2.3-2.4, HL 0.57-0.62, HW 0.45-0.49, CI 77-82, ML 0.27-0.30, MI 46-52, SL 0.22-0.26, SI 46-53, PW 0.33-0.35, AL 0.62-0.68 (10 measured). Characters of gundlachi-complex. Inner margins of mandibles strongly convex in full-face view, at full closure touching at about the midlength and diverging both proximally and distally. Apex of mandible with 3 minute intercalary denticles between apicodorsal and apicoventral teeth. Preapical denticles 3 in number, spaced out and located in the apical third of the mandible length, the proximal (basalmost) denticle usually the largest (rarely otherwise); denticles usually about equidistant but sometimes the proximal more widely separated from the other two. Scape broadening medially but not expanded into a wide lobe, SL ca 3.5 X the maximum scape width. Eye usually with 4 ommatidia in the longest row. Pronotum markedly depressed, the dorsum only weakly convex, bluntly marginate dorsolaterally. Ground-pilosity of head and alitrunk of sparse minute appressed pubescence. Apicoscrobal hair short. Cephalic dorsum with a pair of short erect hairs at highest point of vertex and another pair close to occipital margin. Pronotal humeral hair present. Mesonotal dorsum with a single pair of erect hairs. Head, alitrunk and waist segments reticulate-punctate except for katepistemum which is mostly smooth. First gastral stemite smooth, not reticulate basally.

Type Material
Holotype worker, COSTA RICA: no locality data, 18.vii.1931 (F. Nevennann) [examined].

Additional References

 * Baroni Urbani, C. & De Andrade, M.L. 2007. The ant tribe Dacetini: limits and constituent genera, with descriptions of new species. Annali del Museo Civico di Storia Naturale “G. Doria” 99: 1-191.