Bulletin . There are two distinctspecies of canker-worms, thefall canker-worm (Anisoft-teryx pometa?ia) and thespring canker-worm (Pa/ea-crita vernata). The mothsof the former emerge mostlyin autumn, while those ofthe latter appear in various stages of thespring species are represent-ed in Fig. 2, and of the fall i->- a mi Fig. 2.—The spring canker-worm: a, species in rig. x. As will , . egg mass, natural size; /, egg, magni-be seen, the insects resemble fied. f> ,arva. ^ female moth; e> ma]e each other, one of the chief moth. (After Riley.) differences being in the shape o
Bulletin . There are two distinctspecies of canker-worms, thefall canker-worm (Anisoft-teryx pometa?ia) and thespring canker-worm (Pa/ea-crita vernata). The mothsof the former emerge mostlyin autumn, while those ofthe latter appear in various stages of thespring species are represent-ed in Fig. 2, and of the fall i->- a mi Fig. 2.—The spring canker-worm: a, species in rig. x. As will , . egg mass, natural size; /, egg, magni-be seen, the insects resemble fied. f> ,arva. ^ female moth; e> ma]e each other, one of the chief moth. (After Riley.) differences being in the shape of the egg (see b in each figure). Both species are found in New Hampshire. The canker-worm is distributed largely through the action ofthe wind in blowing suspended larvae from one tree to the vi-cinity of another. Lowell has described the process in theselines : The worm, by trustful instinct led, Draws from its womb a slender threadAnd drops, confiding that the breezeWill waft it to unpastured trees. TH
Size: 2156px × 1159px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthornewhampshireagricultu, bookcentury1800, bookdecade1890
