In this paper the descriptions of the adult, pupa and larva of Paraprays anisocentra (MEYRICK) (=Hyponomeuta usuguronis MATSUMURA) are given, and the important characters are figured in detail. Pupa (figs. 23-25) : Length 5.5-7 mm, width about 1/4 length. Dark brown. Abdomen with distinct spines as illustrated. Mature larva (figs. 8-22): Length 11 mm (longest). Average width of head 0.8mm. Head brown with black-brown markings, eye-spot black. Body dark grey-brown, venter paler, with yellow-green to grey-green dorsal, supraspiracular and subspiracular lines; pinacula black; prothoracic shield black; thoracic legs black-brown, with brown claws; peritreme of spiracles black-brown; anal plate nearly black. Ecological notes: Bivoltine. Larva gregarious, in a dense common web on leaves of Albizzia Julibrissin DURAZZINTI (Leguminosae). Pupa in a dense white cocoon within the larval web. Hiber-nating in pupa. Adults emerge from late in May to early in July and from the middle of August to September. Larvae in mid June-during August and late August-mid October.

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Erebia niphonica and E. ligea-both species belong to Satyridae, Lepidoptera-are well known as "Alpine butterflies" in Japan. In this paper, the author collected the data of distribution of both species in the Akaishi Mountains and its vicinity, and tried to discuss the establishment of the distribution, in a point of bio-geographical and ecological view.

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[in Japanese]

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