[in Japanese]

View full abstract

The poplar admiral, Limenitis populi jezoensis Matsumura usually becomes the third-instar larvae before winter comes, and passes the winter by the third-instar larvae. However, it was discovered that the some larvae had grown up to the fourth-instar larvae before winter came by the poplar admiral in the Chubu region, Honshu, Japan. The fourth-instar larvae appeared almost every year and they showed up regardless of the day length. So, it was guessed that this species or the species in this region was a population with the gene generated twice or more a year.

View full abstract

Sasakia charonda is single brooded in nature. Very rarely second brood has been recorded under breeding condition in netted environment in extremely hot summer or in times when bright overnight garden light was nearby. In the fall of 2008, two males and four females of second brood emerged from successively breeding materials since 2006. After coupling one pair of these second broods, about 60 eggs were obtained which hatched in late October to early November. These larvae grew steadily but could only reach to second instar by December when natural defoliation of food plant Celtis sinensis began. For diapause to occur, growth to at least fourth instar is required (?). In breeding in the room, potted Celtis boninensis was used, which had renewed foliation under artificial condition in green house. Larvae grew slowly during winter without hibernation. In May, they pupated. Six males and three females emerged in mid May to early June. Sizes of emerged adults were intermediate between first and second brood. They were fertile and numerous additional second broods appeared in the following autumn which might suggest hereditary factor as a cause of second brood emergence.

View full abstract

Catcphia linteola Guenee. 1852 was newly recorded from Ishigaki-jima Island, Okinawa Pref., Japan. This species widely distributed in the East Africa, Madagascar, area along the Indian Ocean, Indo- Australia and Pacific tropicus.

View full abstract