A new species of Karekizo Morimoto, 1962 (Coleoptera: Curculionidae: Molytinae) from the Alishan Mountains of Taiwan and a first record of Karekizo impressicollis outside Japan.

Karekizo Morimoto, 1962 represents a rarely collected, mountain-dwelling genus which has hitherto been known only from one species, K. impressicollis Morimoto, 1962, in Japan. Here, a second species, Karekizo depressus sp. n., is described based on a single specimen collected from Fen-Chi-Hu, Chiayi Hsien, Taiwan. The type species, K. impressicollis, is reported for the first time outside of Japan, from South Korea (Jeju Island, Mt. Hallasan). X-ray microtomography is used to non-destructively compare the sub-scale cuticular structure (e.g., density of punctures, presence of tubercles or carinae) of the two species. A photographic key to the species is also presented.

A revision of the North American genus Proctorus (Coleoptera, Curculionidae, Ellescini) with descriptions of two new species.

The rarely collected North American endemic genus Proctorus (Coleoptera, Curculionidae, Ellescini) has hitherto contained two described species, P.armatus LeConte, 1876 and P.decipiens (LeConte, 1876). Here, Proctorus is revised and two new species, namely P.emarginatus sp. nov. and P.truncatus sp. nov., are described. Lectotypes for P.armatus and P.decipiens are designated from known syntypes. All four species in the genus are associated with Salicaceae, but, in addition to differences in external and genital morphology, there is also evidence of differing host plant usage between the species. A photographic key to the four species is provided to facilitate identification.