In this paper, two new species were described from Formosa, and the scientific names of three species were replaced as synonyms, while two subspecies were again confirmed. In preparing this paper, the authors are indebted to Lt. Col. J. N. Eliot and Mr. C. K. Yu for their kind advice, suggestion or offering precious materials.

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The releaser for the feeding behavior, the mechanism of food-finding and the color preferences in flower-visiting in the adult of Nymphalis xanthomelas japonica Stichel were examined under quasi-natural conditions. Feeding behavior of the adult is released by the taste of food and/or the odor emanating from food itself or food-donors (flowers, for instance), but not by the color or the shape of food-donors. In searching for food, the adults stimulated by the odor of food or food-donors, find out food mainly by exercising olfactory sense and only with the supplemental aid of the gustatory chemoreceptor of the tarsus of legs or visible sense. Olfactory chemoreceptors, therefore, have an important function in the feeding behavior of this species. Although the adults hardly visit merely colored objects (scentless artificial flowers, for instance) nor are they prompted to try reaching the proboscis for food by such odorless matters, yet when the adfults come flying to scented and colored objects, colors of the objects also seem to be a clue of finding, and the adults readily find the objects if they are both scented and colored. But the color of food or a food-donor essentially exerts no influence on the feeding behavior. The adults, however, really have the color sense, and at least bluish and yellowish colors are discriminated out of others. In flower-visiting the adults display preferences not only on the odor but also on the color of flowers, and have a manifest liking to several colors: blue, yellow and white. In addition bluish color seems to be far preferred to the yellowish.

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[in Japanese]

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Eleven species of the genus Catocala have been hitherto recorded from Kagawa Prefecture. In this paper, 5 species of the genus, C. hyperconnexa, C. dissimilis, C. dula, C. duplicata and C. mirifica, were added to the fauna of this area. Latter two species were also the first record from Shikoku Island.

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1) Ovipositing in captivity was studied on some Lycaenid butterflies at Aomori Pref. in 1974 and 1975. The well-conditioned females of Neozephyrus sniaragdinus and Wagimo signata were alive over a ten-day period, and laid eggs 100 or more in captivity with a sleave covering the food-plants. 2) The natural history of W. signata in the district of Aomori is as follows: This species is essentially single-brooded and hibernates as an egg. July and August are the usual months for the butterfly. Both sexes of this butterfly are on the wing contemporaneously in early June. It is exceptional, as a member of the Japanese Theclini, in that the male-to-female ratio is 1:2 in the natural conditions as well as in breeding ones. They copulate during 4-6 P.M. from the end of July to early August. 3) Two forms, f. signata and f. quercivora, of W. signata inhabit in the same areas of Aomori district. Of sixteen copulations found in the fields, one was signata×quercivora. One female of signata, verified to have copulated with quercivora, laid 66 eggs in total. The hybrid offspring comprised 20 quercivora and 15 signata. They showed marked individual-variations in size, ranging from near-normal to excessively small.

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[in Japanese]

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