A survey of the emesine assassin bugs of the tribes Collartidini, Leistarchini, Emesini, and Metapterini of Taiwan (Hemiptera, Heteroptera, Reduviidae)

Thread-legged assassin bugs (Hemiptera: Heteroptera: Reduviidae: Emesinae) belonging to the tribes Collartidini, Leistarchini, Emesini, and Metapterini of Taiwan are surveyed. Eight genera and thirteen species are recognized, four species are described as new. Collartidini (represented by the genus Collartida Villers, 1949) is recorded for the first time not only from Taiwan but from Southeast Asia as well. Malaria ryukyuana Ishikawa & Tomokuni, 2002, Gardena albiannulata Ishikawa, 2005, and Stenolemus crassirostris Stal, 1871 are recorded for the first time from Taiwan. The species Collartida peregrina sp. n.. Bagauda zigzag sp. n.. Ploiaria huangorum sp. n., and Stenolemus alikakay sp. n. are described as new Identification keys to the species of the above tribes occurring in Taiwan are presented, and their zoogeography is briefly discussed.