Relict occurrence of three 'American' Scolytidae (Coleoptera) in Asia

The first non-American representatives of the bark beetle genus Pseudopityophthorus , of the subtribe Corthyhna (Corthylini), and of the Ips concinnus species group are named. All are apparently relicts of an early faunal exchange with North America. The new taxa include: Gnatharus, new genus, and its type-species Gnatharus tibetensis, new species (Tibet); Xenophthorus , new subgenus, and its type-species Pseudopityophthorus {Xenophthorus) peregrinus, new species (Tibet), and Ips orientalis, new species (Tibet, China). The intercontinental exchange of other taxa in Scolytidae are also mentioned.