蜂による赤クローバー (Trifolium pratense L.) の授精に關する研究 : I 赤クローバーを訪問する蜂に就いて

抄録

According to the auther's observation, the bees that visit the red clover in Sapporo, Hokkaido were as follows : Bombus wustneii chinganensis Reinig, B. speciosus Smith, Eucera sociabilis Smith, Andrena spp. and Apis spp. Besides the bees mentioned above, B. jonellus Kirby and B. muscorum L. also visited the red clover in Hokkaido, especially the latter was seen in considerable numbers. Male of Eucera sociabilis Smith were most numerous and a large number of bees of Apis spp. were also working on the red clover. B, wustneii chinganensis Reinig most active but was not plentiful. In Fukuoka, Eucera sociabilis Smith, Andrena spp., Anthophora villosula Smith and Apis spp. were seen on Trifolium pratense L. The cause of shortage in number of bees visiting the red clover in Fukuoka was seemingly attributable to minority of that plant ; if red clovers were abundant those bees might be also more numerous.