- Cyrtophyllus concavus
- Katydid Ka"ty*did`, n. (Zo["o]l.) A large, green, arboreal, orthopterous insect ({Cyrtophyllus concavus}) of the family {Locustid[ae]}, common in the United States. The males have stridulating organs at the bases of the front wings. During the summer and autumn, in the evening, the males make a peculiar, loud, shrill sound, resembling the combination Katy-did, whence the name. [1913 Webster]
The Collaborative International Dictionary of English. 2000.