Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 140 A A' ECONOMIC ENTOMOLOGY. males, who alone are musical, giving rise to that oft-quoted old saying,— 'Happy the cicadas' lives, For all have voiceless wives.' The plan of the sound-organs can best be described bv com- paring to a slightly convex-bottomed tin pan, which makes a Fig. ioi. a, Ceresa bubalus, ovipositing in slits b ; the The dog-day harvest-fly, eggs, if, arranged as at c; old, scarred punc- Cicada tibiceji. tures shown at e. snapping noise whenever the bottom is force
Economic entomology for the farmer Economic entomology for the economicentomolo00smit_0 Year: 1896 140 A A' ECONOMIC ENTOMOLOGY. males, who alone are musical, giving rise to that oft-quoted old saying,— 'Happy the cicadas' lives, For all have voiceless wives.' The plan of the sound-organs can best be described bv com- paring to a slightly convex-bottomed tin pan, which makes a Fig. ioi. a, Ceresa bubalus, ovipositing in slits b ; the The dog-day harvest-fly, eggs, if, arranged as at c; old, scarred punc- Cicada tibiceji. tures shown at e. snapping noise whenever the bottom is forced to change from convex inwardly to convex outwardly. By an exceedingly rapid snapping of the convex 'drum' of the cicada, the continuous shrilling sound is produced, intensified and modified by the vari- ous tense membranes more or less surrounding it. The most famous species of this family is the ''periodical cicada,' or ' seventeen-year locust,' Cicada septe7idecim. It is of especial interest from the unusually long larval period, re- maining in the Middle and Northern States sixteen years beneath
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