Polyrhachis longipilosa

This species, known only from Thailand, was collected from the canopy at about 25 m above the ground, while Polyrhachis constructor, Polyrhachis varicolor and Polyrhachis flavicornis were found on shrub trees at 1.59–5 m above the ground and nested on the underside of plant leaves or between leaves (Noon-Anant et al. 2008, Noon-Anant et al. 2009, Jaitrong et al. 2023).

Identification
Polyrhachis longipilosa is similar to Polyrhachis constructor. However, P. longipilosa is easily distinguished from the latter by the following worker characteristics:
 * 1) hairs on antennal scape longer than maximum width of antennal scape (shorter or almost as long as maximum width of antennal scape in P. constructor)
 * 2) petiolar spine with long standing hairs (without standing hairs in P. constructor)
 * 3) hairs on first gastral tergite almost as long as maximum diameter of eye (distinctly short than maximum diameter of eye in P. constructor)
 * 4) head and mesosoma with stronger sculpturing (weaker sculpturing in P. constructor; see figs 1A–C and 6 for comparison)
 * 5) striation on pronotum well-defined (ill-defined in P. constructor; see figs 1B and 7C for comparison).

Distribution based on Regional Taxon Lists
Oriental Region: Thailand.

Nomenclature

 *  Polyrhachis longipilosa Jaitrong, Yamane & Noon-Anant, 2023: 428, fig. 7 (w.) THAILAND.

Type Material

 * Holotype. Worker (THNHM-I-26206, THNHM), W Thailand, Kanchanaburi Prov., Thong Pha Phum Dist., Ban Sahakorn Nikhon, dry evergreen forest, canopy, 25 m from ground, 8.XI.2021, W. Jaitrong leg., TH21-WJT-789.
 * Paratypes. Eleven workers (THNHM-I-26207 to THNHM-I-26217, THNHM) same data as holotype.