Pseudoscymnus tsugae sp. nov. is described. In Honshu, Japan, it has been col lected b e t w e e n 34°11' and 36°50'N latitude and from sea level to 1,980 m. The adult and the mature larva are illustrated. T h e beetle may b e a good candidate for the biological control of hemlock woolly adelgid, Adelges tsugae Annand, in North America.
The family Mychothenidae (Coleoptera) of Japan is revised. Five new species are described in this paper : Mychothenus hirashimai (Okinawa), Bystodes jikvoapicalis (Okinawa), Bystodes kidui (Kyushu), Bystodes yaeyamensis (Ishigaki-jima), and Idiophyes uenoi (Okinawa). A key to the genera and species of the Japanese Mychothenidae is also provided.
SummaryGeographical variation in the elytral spot patterns of a phytophagous ladybird, Epilachna vigintioctopunctata, was studied in the Province of Sumatera Barat, Indonesia. Populations of E. vigintioctopunctata were divided into four major groups (I–IV) by the incidence of spot pattern variations. Group I, occurring in the coastal plains and inland lowlands, and Group IV, confined to the highlands, were the extremes of the spot pattern variations, the latter had many more non‐persistent spots and confluences with larger body size and advanced melanism than the former. These two groups were connected with each other via the intermediate groups. A positive relationship was detected between the elevations of sample sites and the average number of non‐persistent spots per elytron. Consequently, present results favor the view that the two previously recognized forms of E. vigintioctopunctata (formae A and B inKatakura et al., 1988) represent a complicated intraspecific variation rather than two distinct sibling species. Elytral spot pattern variations were not different between the sexes or between the beetles collected from different kinds of host plants.
A new bothriderid, Antibothrus morimotoi (Coleoptera, Cucujoidea) is described from Japan. A key to the Japanese genera of Bothriderinae is provided, with a brief description of Leptoglyphus vittntus Sharp.
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