Abstract
Taxonomic and zoogeographical notes of 21 genera of Japanese Cryptinae are reported. Five new species, Giraudia japonica sp. nov., Ischnus splendens sp. nov., Nematopodius (Nematopodius) montanus sp. nov., Xoridesopus amamiensis sp. nov. and X. tokarensis sp. nov. are newly described. Giraudia japonica sp. nov. resembles G. gyratoria (Thunberg, 1822) in the yellow scutellum and the normal shaped wings, but can be distinguished by the following combination of character states: postpetiole covered with fi ne and distinct sculptures; base of antenna black: hind trochanter and trochantellus blackish brown; metasomal tergites more or less darkened. Ischnus splendens sp. nov. apparently resembles I. bimaculatus Jonathan, 2006 (male unknown) from India in the body with many yellow markings and the frons with a median carina and a few longitudinal striations, but it can be easily distinguished by the following combination of character states: MSL 1.0–1.1 times as long as MSL hind coxa with two yellow markings, one at dorsally and other at anteroventrally. Nematopodius (N.) montanus sp. nov. resembles N. formosus Gravenhorst, 1829, but it can be distinguished by the nervellus intercepted anterior to midpoint (intercepted posterior to midpoint in N. formosus) and the antenna already without a white band (usually with a small white band). Xoridesopus amamiensis sp. nov. apparently resembles X. nigritibia Gupta & Gupta, 1983, from Indonesia, but it can be distinguished by the following combination of character states: epomia weakly present; hind femur reddish brown; T3 densely punctate. X. tokarensis sp. nov. apparently resembles X. schuleri (Dalla Torre, 1902) from India, Burma and Indonesia, but it can be distinguished by the following combination of character states: hind coxa largely black; scutellum densely punctate. Two species, Apsilops scotinus (Tosquinet, 1903) and Nematopodius (Nematopodius) debilis (Ratzeburg, 1852) are newly recorded from Japan. Three synonyms are newly recognized, i.e., Dihelus niger Gupta & Gupta, 1978 = D. hylaevorus (Momoi, 1966) (syn. nov.), Gerdius iriomotensis Kusigemati, 1986 = Eurycryptus sakaguchii (Uchida, 1932) (syn. nov.) and Torbda parallela Momoi, 1970 = T. sauteri Uchida, 1932 (syn. nov.). Two new combinations of the generic status of Cryptus ohshimensis Uchida, 1930, and Torbda takachihoensis Momoi, 1966, are proposed, i.e., the former is transferred to Hedycryptus and the latter is to Pterocryptus (comb. nov.). Some new distribution records in Japanese Cryptinae are also reported.
