<国立科博専報>東北地方におけるヤガ類2種の黒化について

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Antivaleria viridimacula (GRAESER), a medium-sized noctuid moth having deepgreen markings on the forewing, is one of the commonest autumnal fliers and widely distributed in all the main islands of Japan. Of this beautiful moth, a remarkable melanic form was discovered in the northern part of the Tohoku District. Melanic individuals have dark brown coloration instead of the green maculations of the typical form (Figs. 1-9). For clarifying the distribution and abundance, inquiries were made to the members of the Japan Heterocerists' Society, and 32 persons answered it. Judging from the collecting data, directly checked by myself, and from the answers to the inquiries, the following interesting facts were revealed : 1) the melanic form is found in Hakodate (southern end of Hokkaido), Aomori Pref., Akita Pref., Iwate Pref. and Gunma Pref.; 2) its maximum frequency seems to be about 50 percent in the northern part of Akita Pref.; 3) in Aomori Pref., the frequency of the occurrence of the melanicform is considered to be 2-20 percent; 4) four melanic specimens were collected in Iwate Pref., and the single melanic one was captured at Hakodate and Gunma Pref., respectively. See Fig. 10. On the other hand, six melanic individuals of the autumnal noctuid moth, Daseochaeta viridis (LEECH), were also collected in the northern part of Akita Prefecture.They show a gradation in the degree of melanism (Figs. 11-19). It is worth noting that the melanic specimens were collected only in 1975.
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<国立科博専報>東北地方におけるヤガ類2種の黒化について

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