. Principles of economic zoo?logy. Zoology, Economic. 138 BRANCH ARTHROPODA in a sweet solution a destructive fungous growth (Fig. 107). A few members of the swarm are dipped in the solution and turned loose, spreading the disease.' Melan'oplus allan'lis sometimes does much harm in New England. Locusts lay their eggs, numbering from to , in oval masses, cov- ered with a glutinous substance. The female deposits them (Fig. 108) in the ground or in rotten wood, with her strong, horny ovipositor, or they may be laid on the surface of the ground among the grass and weeds. The eggs are usual
. Principles of economic zoo?logy. Zoology, Economic. 138 BRANCH ARTHROPODA in a sweet solution a destructive fungous growth (Fig. 107). A few members of the swarm are dipped in the solution and turned loose, spreading the disease.' Melan'oplus allan'lis sometimes does much harm in New England. Locusts lay their eggs, numbering from to , in oval masses, cov- ered with a glutinous substance. The female deposits them (Fig. 108) in the ground or in rotten wood, with her strong, horny ovipositor, or they may be laid on the surface of the ground among the grass and weeds. The eggs are usually laid in the fall and hatch in the spring, there being but the one new brood a year. The young resemble the parents in general, having biting mouth parts and long legs. They are paler and wingless. The wings appear as minute scale-like projections and grow larger with each of the five or six molts (Fig. 104) Strangely enough, the hind wings, which are always underneath the fore wings in the adult, lie outside during devel- opment. Birds are the best exterminator. The eggs may be plowed up. Fig. 108.—Rocky Mountain locust: a, a, a, Female in different positions, ovipositing; b, egg-pod extracted from ground, with the end broken open; c, a few eggs lying loose on the ground; d, e, show the earth partially removed to illustrate an egg-mass already in place and one being placed; /, shows where such a mass has been covered up. (After Riloy.) in the fall, or when tliey hatch in the spring the young could be crushed by heavy rollers or burned by scattering straw over the ground and lighting Locus'tidae.—This family includes crickets, katy-dids, and long-homed grasshoppers. Unfortunately, the common name of locust is applied only to members of the family of Acruliiloc. and to the cicada of the order Hemipliira, hut to noii(> of the L()ri/.s7((/(r. The long-horned meadow-green grasshopjier has the delicate antennaj longer than the body, the tarsi four jointed, the o\-iposi
Size: 1830px × 1365px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphila, bookyear1915
