A meticulous observation on the biology and occurrence rule of Pachynematus itoi Okutani was conducted in Dunhua City, Jilin Province.

• 对伊藤厚丝叶蜂生物学、发生规律等方面进行了较为细致的研究。结果表明,伊藤厚丝叶蜂在吉林省1年3代,以预蛹在落叶层下越冬。