Strumigenys biolleyi

Identification
This species, like S. smithii, S. prospiciens and other members of the mandibularis series, possesses a small but distinct and acute intercalary tooth between the largest teeth of the apical mandibular fork, and two strong spiniform preapical teeth. In size, general proportions and facies, biolleyi closely resembles smithii and prospiciens, but differs from both in the shape of the propodeal lamellae and, less strikingly, in having relatively slightly more slender mandibular shafts. In closely related species, each propodeal lamella forms an upper and a lower tooth or distinct angles separated by an excision or concavity (except in hemidisca sp. nov.; see below). In S. biolleyi, however, the upper (dorsal) of these angles is obsolete, represented by at most a feeble convexity, while the lower angle remains well developed as a salient triangular tooth, acute but with a usually blunt extremity. In the more distantly-related S. cordovensis Mayr, a similar condition occurs as an inconstant variation, but in biolleyi the propodeal form varies only within very narrow limits and appears to be characteristic.

Distribution
This taxon was described from Costa Rica.

Nomenclature

 *  biolleyi. Strumigenys biolleyi Forel, 1908b: 43 (w.) COSTA RICA. Brown, 1953f: 103 (q.); Wheeler, G.C. & Wheeler, J. 1960b: 26 (l.). Senior synonym of luctuosa, tridens: Brown, 1953f: 101. See also: Bolton, 2000: 530.
 * tridens. Strumigenys (Strumigenys) tridens Weber, 1934a: 29, fig. 3 (w.) PANAMA. Junior synonym of biolleyi: Brown, 1953f: 101.
 * luctuosa. Strumigenys (Strumigenys) luctuosa Menozzi, 1936c: 81, fig. 1 (w.) COSTA RICA. Junior synonym of biolleyi: Brown, 1953f: 101.