A status of Satyrus motschulskyi Bremer & Grey is discussed. Lectotypes of Satyrus motschulskyi and Ypthima amphithea are designated, studied and considered as conspecific. A valid name for Y. motschulskyi sensu Elwes & Edwards, 1893 is, thus, Y. multistriata Butler, 1883, stat. rev. A new subspecies, Y. multistriata koreana ssp. n. is described from Korea.

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Four new host plants, Wisteria floribunda (Leguminoceae), Carpinus japonica (Betulaceae), Alnus serrulatoides (Betulaceae) and Quercus glauca (Fagaceae) are recorded as hosts for Synanthedon tenue (Butler, 1878) from Honshu, Japan.

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A nymphuline moth, Agassiziella angulipennis, caught at the Japanese Plant Quarantine was recorded with the host plant.

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A male Agrias beata beata f. staudingeri Michael was captured with unusual hindwing black pattern at Atalaya, Peru.

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One female and seven males of Agrias beata Staudinger were presented with yellow or red coloring along forewing costal veins.

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Tipasa renalis (Moore) is recorded from Japan for the first time. Adult and the male genitalia are illustrated and described, and syntypes of renalis and its synonym, rubrirena Hampson, are figured.

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Hybridization of Byasa alcinous miyakoensis Omoto and two other subspecies (B.a. alcinous and B.a. bradanus) was studied. All hydrids proved to be fertile, but F_1 hybrid females between B.a. alcinous female and B.a. miyakoensis male suffered an impediment in their developmental process.

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A rearing experiment on the chestnut tiger butterfly, Parantica sita (Lepidoptera, Danaidae), was made under a photoperiod of 12L-12D or 16L-8D at 15, 20 or 25℃. Mean egg, larval and pupal stages were about 5, 7 and 12; 18, 23 and 40; and 10, 15 and 27 days, at 25, 20 and 15℃, respectively, and they had not entered diapause under any conditions. It takes 2 weeks for half of the females to mature eggs even at 25℃. Field researches were also made in 3 habitats of P. sita in the Kii Peninsula. Esuzaki (alt. about 20m), on the south coast facing the Pacific Ocean, was used mainly by the overwintering generation and few individuals were seen between spring and autumn. At Yamada (alt. about 360m), at the southern foot of the Izumi Range, individuals of immature stages were seen on the evergreen milkweed, Marsdenia tomentosa (Asclepiadaceae). At the study site of Mt Wasamata (alt. 1,100m), on the eastern slope of the mountain, lots of adults were seen from July to August and a few eggs and larvae were also seen on the deciduous milkweed Cynanchum caudatum (Asclepiadaceae), in the summer season. The number of generations of the 3 habitats estimated from effective accumulative temperatures of each habitat could not explain the actual occurrence of each habitat. This may be because of the high migratory nature of this species.

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Developmental zero point of Amphipyra livida corvina was calculated as 8.9℃ by rearing larvae under 6 temperature conditions. Total effective temperature was also estimated as 784 degree-days. The larvae reared on artificial bait became more whitish than those reared normally on the host plants. The larval and pupal period of individuals reared on artificial bait were significantly delayed.

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The haploid chromosome number in males of Neope goschkevitschii from Iwata-shi and Nobeoka-shi is 46, with a single element which can be distinguished from the rest by its larger size. The chromosome constitutions in two examined males of Neope niphonica niphonica from Chichigatani of Miyagawa-mura (Mie-ken) differ from each other. The male, No.1, has an n, 28-karyotype. In the male, No.2, the haploid chromosomes total 29 in primary spermatocytes and both n, 29- and n, 28-secondary spermatocytes are observed in the second division. The n, 29-spermatocyte retains one B chromosome which is the smallest in the complement.

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On the basis of adult and immature characters, two new chalcosiine genera from eastern Palaearctic Asia are proposed: Neochalcosia gen. nov. for Eterusia remota Walker, 1854=Chalcosia remota (Walker, 1854), and Pseudopidorus for Aglaope fasciata Felder & Felder, 1862=Pidorus euchromioides (Walker, 1864). In the preferred cladogram, the Neochalcosia+Pseudopidorus clade may possibly form a sister-group with the Chalcosia+Milleria clade. In addition, we also discuss the important morphological characters of the Chalcosia genus-complex and the effects of those characters on the taxonomy of the complex.

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Moths were caught by a light trap at three research sites in the middle part of Yamaguchi. The survey was made at one-month intervals for three years. The numbers of moths and of species caught at each research site fluctuated seasonally in almost the same patterns. Noctuidae moths represented almost the same proportion throughout the year. Geometridae moths decreased, but those of the Pyralidae increased in proportion during summer. The patterns of seasonal fluctuation of the moth populations appear to be common throughout the mountain parts of Yamaguchi.

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Japanese species of the genus Adela Latreille, [1796], are revised. Four species are recognized from Japan: Adela reaumurella (Linnaeus, 1758), A. luteocilis sp. nov., A. luminaris sp. nov. and A. praepilosa sp. nov. Although A. nobilis Christoph, 1882 has been believed to be distributed in Japan, it is found that most Japanese representatives formerly known as A. nobilis belong to a distinct species, which is described here as A. praepilosa sp. nov. Differences of sexual dimorphism, such as eye size and antennal length, seen among the males of closely related species, are inferred to be independently acquired in each species probably relating to their precopulatory behavior.

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