著者

中尾 舜一

出版者

日本昆虫学会

雑誌

昆蟲 (ISSN:09155805)

巻号頁・発行日

vol.26, no.4, pp.201-209, 1958-12-10

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In the previous paper (Nakao, 1952), the author reported the fact that the diurnal sound-producing activity of Meimuna opalifera Walker belongs to a type of rhythmicity dependent upon the environmental conditions. But a song-length of this cicada in a day is independent to the environmental conditions, because a song-length seems to be lengthened with the lapse of time in a day irrespective of the various weather conditions. However, it is appreciably influenced by the high population density of the cicadas which gives the males more chances to meet the females or vice versa. The song-length is shortened when the population density of the cicadas becomes high, and the high population density disturbs the normal diurnal variation of a song-length. This fact seems to indicate a close connection to the active interaction between the sexes.