katydid 的词源

这种大型绿色蝗虫状昆虫的流行名称出现在1784年，属于美式英语，模仿雄性在振动翅膀时发出的刺耳声音。在美国东部，它是夏夜中常见的声音；这种声音在1751年被更准确地记录为catedidist。

[T]heir noise is loud and incessant, one perpetually and regularly answering the other in notes exactly similar to the words Katy did, or Katy Katy did, repeated by one, and another immediately bawls out Katy didn't, or Katy Katy didn't. In this loud clamour they continue without ceasing until the fall of the leaf, when they totally disappear. [J.F.D. Smyth, "A Tour in the United States of America," 1784]

[它们的声音既响亮又持续，一个接一个地用完全相似的音调回答对方，听起来就像Katy did，或者Katy Katy did，一个发出这样的声音，另一个则立刻大声回应Katy didn't，或者Katy Katy didn't。在这种喧闹的鸣叫中，它们会一直持续到落叶时节，之后便完全消失了。[J.F.D. Smyth，《美国游记》，1784年]