Taxonomic notes on three species of the genus Agonischius (Coleoptera, Elateridae, Elaterinae, Elaterini) with a new species from Taiwan

Agonischius yokoyamai sp. nov. is described and represents the first record of Agonischius from Taiwan. This species resembles A. lateritius and A. insolitus, but is distinguished from the former by an orange body, yellowish-brown setae, longer antennae, and longer female sternite and tergite VIII, and from the latter by a wider body and differences in the male and female terminalia. Mouth-parts, abdominal terminalia and genitalia of this genus are described in detail and illustrated for the first time. These observations reveal that female sternite VIII and tergite VIII may be useful for species identification of Agonischius.