. Elementary agriculture . horn-like and is usually considered the skeleton of the insect. As it becomes hard it will not stretch; and when the insect has grown so large as to en- tirely fill this hard coat, a new or soft coat forms underneath; and the old one is slied or cast off. The casting off of an old coat, or shell, is called moulting. The skin is moulted several times during the life of the insect, and each time it becomes larger. The Courtesy U. S. Dept. of Agriculture i ⢠r i ⢠xi ⢠chiei changes m the m- FiG. 40. Curculio depositing its j » ti^ n egg upon a young peach. SCCt's l
. Elementary agriculture . horn-like and is usually considered the skeleton of the insect. As it becomes hard it will not stretch; and when the insect has grown so large as to en- tirely fill this hard coat, a new or soft coat forms underneath; and the old one is slied or cast off. The casting off of an old coat, or shell, is called moulting. The skin is moulted several times during the life of the insect, and each time it becomes larger. The Courtesy U. S. Dept. of Agriculture i ⢠r i ⢠xi ⢠chiei changes m the m- FiG. 40. Curculio depositing its j » ti^ n egg upon a young peach. SCCt's lite USUally COmC in the last two moults. Stages of Development. Wasps, bees, butterflies, moths, beetles, flies, and mosquitoes have very re- markable changes in the last moults. Such insects are said to have four stages of life: (1) the egg stage, (2) the larva or grub stage, (3) the pupa stage, (4) the adult stage. courtesy U. S. Dept. of Agriculture \r igb. â *_ dUU -iO.) stfoying the fruit.
Size: 1978px × 2527px
Photo credit: © The Bookworm Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectagriculture, bookyear
