Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 to the fullness of that water stage, it ascends some reed dur- ing the night, and about dawn its back breaks open and out creeps slowly and apparently painfully the dragon-fly, perfect in form but limp and colorless. The bright sunlight, already appear- ing, soon hardens its skeleton structure and brings out the characteristic colors of the par- ent insect which dropped the egg in the pond. —Bird-lice have, by reason of their parasitic hab- its existing through a long pe- riod, be
Elementary studies in insect life Elementary studies in insect life elementarystudie00hunt Year: 1902 to the fullness of that water stage, it ascends some reed dur- ing the night, and about dawn its back breaks open and out creeps slowly and apparently painfully the dragon-fly, perfect in form but limp and colorless. The bright sunlight, already appear- ing, soon hardens its skeleton structure and brings out the characteristic colors of the par- ent insect which dropped the egg in the pond. —Bird-lice have, by reason of their parasitic hab- its existing through a long pe- riod, become so highly special- ized as to have little in common with other members of the group. Bird-lice must not be confused with true lice. The former have biting mouth-parts, the latter haustellate. The word Mallophaga is derived from two Greek words, meaning, to eat wool. These insects have incomplete meta- morphoses, are wing- less, and as external par- asites feed upon the feathers, hair or skin of the host. Thev are i/ to be found upon both birds and mammals. FIG. 139. Side and top view of head of nymph of dragon-fly, showing scoop-shaped jointed appendage of lower lip, with pinchers at end. With this the nymph catches 'wigglers' and other prey.
Size: 1011px × 1978px
Photo credit: © Bookworm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
