Abstract
As the insect phenology, the date of the first and last seen of butterfly (Pieris Rapae, L.) and firefly (Lampyridae), the first and last singing of cicada (Platyplenra Kaempferi F., Meimuna opali-fera Walker.) were selected from the original phenological reports issued monthly in Japanese at the Central Meteorological Observatory in Japan.
We calculated the coefficient of correlation between above mentioned date and the monthly mean temperature, monthly mean of highest temperature and the lowest, the duration of sunshine and the amount of precipitation for each meteorological station observed more than ten years,
Calculation was shown in Table 1, 2, 3, 4 and the following result was recognized from them.
The most conspicuous effect was afforded by temperature in the case of the first appearences and singings, while it was not so effective as the amount of precipitation or the duration of sunshine in the last seens and last singings.
In cicada on the drought of 1939, those was demonstrated by the fact that the date of first, singing was earlier and that of last was later than usual.
