. Zoology for high schools and colleges. Zoology. 34t) ZOOLOGY. katydids, etc., and locusts, produce loud, shrill sounds, which are sexual calls. They stridulate in three ways—, first, by rubbing the base of one wing-cover on the other (crickets and green grasshoppers); second, by rubbing the inner surface of the hind legs against the outer surface of the front wings (some locusts); third, by rubbing together the upper surface of the front edge of the hind wings and. Fig. 320.—An African Mantis, or soothsayer, with its egg-mass.—From Mon- ;eiro*s Angola. the under #iirface of the wing-cove
. Zoology for high schools and colleges. Zoology. 34t) ZOOLOGY. katydids, etc., and locusts, produce loud, shrill sounds, which are sexual calls. They stridulate in three ways—, first, by rubbing the base of one wing-cover on the other (crickets and green grasshoppers); second, by rubbing the inner surface of the hind legs against the outer surface of the front wings (some locusts); third, by rubbing together the upper surface of the front edge of the hind wings and. Fig. 320.—An African Mantis, or soothsayer, with its egg-mass.—From Mon- ;eiro*s Angola. the under #iirface of the wing-covers during flight (some locusts). Order 4. Plalyptera.—This group comprises the bird- lice, Psocidse, Perlidse, and white ants (Termitidw). The body is flattened, the head horizontal. The pronotum is usually large, broad, and square. The bird-lice {Mallophaga) are more nearly related to the wingless Psocidae, such as the death-tick (Atropos) than to the Hemiptera, among which they are usually placed, since their free jaws and mouth- parts generally arc like those of the PsocidsB. They prob-. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Packard, A. S. (Alpheus Spring), 1839-1905. New York, H. Holt and Company
Size: 1425px × 1753px
Photo credit: © The Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectzoology
