Bactrothrips quadrituberculatus

Bactrothrips quadrituberculatus (Bagnall) (Fig. 9) Idolothrips quadrituberculatus Bagnall, 1908: 210–211. This species was described from Japan (detailed locality is unknown) based on a unique holotype female collected by G. Lewis. It is widely distributed in the warm temperate region of Honshu and Kyushu, Japan, and recorded subsequently from Yunnan and Hainan, China (Dang & Qiao 2012). In Japan, it inhabits the dead leaves of deciduous broad-leaved trees, and is rarely on evergreen trees. Moreover, it is distributed only in the temperate zone, and not in the subtropical Ryukyus. The male tubercles on tergite VI are somewhat distinctive, stout and strongly curved outwards. Though Fig. 38 in Dang and Qiao (2012) was determined as the abdominal tubercles of B. brevitubus, it is very likely that it is an image of the tubercles of quadrituberculatus. Specimens examined. Japan, many females and males from Honshu and Kyushu (detailed data omitted, see Okajima 2006).