Structures of the male genitalia of the 8 populations were fo und identical. Yet the populations could be divided into three rather distinctive groups according to the ratio of the length of flagellum setae over the width o f antenna flagellum.

• 这8个种群的雄外生殖器构造相当一致，但根据雄虫触角棒节上刚毛的相对长度可以分成3组。