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Despite its small size, Hong Kong hosts a surprising level of ant diversity. Through faunal studies on arthropods conducted in Hong Kong over recent years, a new record and species of the genus Ponera have been discovered, which are introduced here. Ponera guangxiensis Zhou, 2001 is reported for the first time from Hong Kong, and Ponera tudigong sp. nov. is here described as a new species, easily distinguishable from other Ponera species and unique within the genus for its four mandibular teeth. [ABSTRACT FROM AUTHOR]

The species of the ant genus Strumigenys Smith, 1860 found in Hong Kong are reviewed based on new sampling efforts performed over the past five years (2014-2018). Prior to this, 12 Strumigenys species had been recorded from Hong Kong, all confirmed here. Moreover, we add to this list three newly described species: S. hirsuta sp. n., S. lantaui sp. n., and S. nathistorisoc sp. n., and describe for the first time the worker caste of S. formosa Terayama, Lin & Wu, 1995. We report new records for nine additional species, bringing the total number of species to 24, including four newly recorded species (S. hexamera Brown, 1958, S. membranifera Emery, 1869, S. nepalensis Baroni Urbani and De Andrade, 1994, and S. rogeri Emery, 1890) which are considered to be introduced to Hong Kong. A global review of the introduced Strumigenys species is presented. The taxonomic validity of S. feae and S. formosensis is discussed in light of new specimen measurements. New ecological information on the swarming periods of 11 species is presented on the basis of year-long sampling of aerial insects. Finally, the importance of our results within Southeast Asia and the need for future sampling efforts in the region is discussed. [ABSTRACT FROM AUTHOR]