Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . a, Ceresa bubalus, ovipositing in slits b ; theeggs, d, arranged as at c; old, scarred punc-tures shown at e. Fig. The dog-day harvest-fly,Cicada tibicen. snapping noise whenever the bottom is forced to change fromconvex inwardly to convex outwardly. By an exceedingly rapidsnapping of the convex drum of the cicada, the continuousshrilling sound is produced, intensified and modified by the vari-ous tense membranes more or less surrounding it. The most famous species of t
Economic entomology for the farmer and fruit-grower : and for use as a text-book in agricultural schools and colleges . a, Ceresa bubalus, ovipositing in slits b ; theeggs, d, arranged as at c; old, scarred punc-tures shown at e. Fig. The dog-day harvest-fly,Cicada tibicen. snapping noise whenever the bottom is forced to change fromconvex inwardly to convex outwardly. By an exceedingly rapidsnapping of the convex drum of the cicada, the continuousshrilling 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 periodicalcicada, or seventeen-year locust, Cicada septendecim. It isof especial interest from the unusually long larval period, re-maining in the Middle and Northern States sixteen years beneath THE INSECT WORLD. 141 the surface of the ground, feeding on the juices of roots, andtransforming in the spring of the seventeenth year into a wingedadult. No less than twenty-two broods have been tabulated inthe United States, chiefly through the efforts of the late Dr. Riley, so that we know approximately how each is distributed,and are able to foretell with certainty when the insects will appearand about what territ
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectinsectp, bookyear1906
