南方定点観測船に飛来した昆虫類第 3 報

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1. In this report are recorded the insects visited the weather ship "Ojika" located at the Ocean Weather Station "Tango", 29°N 135°E on the northwestern Pacific during September and October, 1967. 2. The insects were collected by net in daytime or captured in night-time when they are attracted to the lights of the ship. A small suction trap with fluorescent lamp was operated every night, this was of use to catch smaller insects. 3. The following groups of insects were obtained : [numerical formula] These are listed in Japanese text and the majority of them are illustrated in Fig. 2. 4. It will be seen that the number and diversity of them are greater than those of June-August catch. But these autumn catches were exclusively indigenous Japanese insects, common or widely distributed in the southern coastal area of Japan. This may due to the prevailing seasonal wind which comes from the north or northwest throughout the autumn season. 5. Two female specimens of the mosquito, Culex tritaeniorhynchus, were captured in a cabin, one on Sep. 21, 21 : 30 (Fig. 4), another on Oct. 18, 23 : 00 (Fig. 6). The wind direction was northery in both cases, NNW 4.7 m/s on Sep. 21, NE 9.8 m/s on Oct. 18. We may suppose their exodus sites to be somewhere in the southwestern coast of Japan. As this mosquito is known to be the main vector of Japanese Summer Encephalitis the dispersal ability for 500 km will be worth to notice. 6. It would be interesting to list a number of "regular migrant" including world-known migratory insects, Pantala flavescens, Nomophila noctuella, Hymenia recurvalis, Lampides boeticus, besides many important agricultural pests of our country, the rice-plant leafhoppers, Sogatella furcifera and Nilaparvata lugens, and many lepidopterous pests, Prodenia litura, Leucania separata, Agrotis ipsilon, Cnephalocrocis medinalis, Parnara guttata, etc.
日本昆虫学会の論文
1969-09-20

南方定点観測船に飛来した昆虫類第 3 報

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