INSECTS
tone becomes also less sharp and piercing. The song may be written tzeet-tzeet-tzeet-tzeet-tzek-tzek-tzek-tzuk-tzuk, though the high key and shrill tones of the notes must be
Fig. 23. The larger angular-winged katydid, Microcentrum rhombifolium
Upper figure, a male; lower, a female
imagined. Riley describes the song as a series of raspings "as of a stiff quill drawn across a coarse file," and Allard
[42]
