It may be worth notice that when Wagner's remarkable discovery was first announced, I was asked how was it possible to account for the larvae of this fly having acquired the power of a sexual reproduction.

值得注意的是， 当瓦格纳的非凡发现首次被宣布时，有人问我如何解释这种苍蝇的幼虫获得了有性生殖的能力。