. Animal biology. Zoology; Biology. CLASS INSECTA 281 Some insects exhibit in their hfe history even more than the four stages—egg, larva, pupa, and adult. In some beetles there are two types of larvae, one with legs and caterpillar-like, the other without them and maggot-like, and one of these types follows the other. This condition is known as hypennetamorphosis. In other cases a subimago stage precedes the adult, or imago stage, the change from subimago to imago involving a molt and a modification of certain details of Fic. 180.—Life history of a holometabolous insect, a butterf
. Animal biology. Zoology; Biology. CLASS INSECTA 281 Some insects exhibit in their hfe history even more than the four stages—egg, larva, pupa, and adult. In some beetles there are two types of larvae, one with legs and caterpillar-like, the other without them and maggot-like, and one of these types follows the other. This condition is known as hypennetamorphosis. In other cases a subimago stage precedes the adult, or imago stage, the change from subimago to imago involving a molt and a modification of certain details of Fic. 180.—Life history of a holometabolous insect, a butterfly, Danaus archipims Fabricius; a, egg; b, larva; c, pupa; d, adult. Natural size. (a to c from Jordan and Kellogg, "Animal Life," by the courtesy of D. Appleton & Company; d, from a specimen.) 314. Autotomy.—Some insects possess the power of autotomy, but regeneration is known to occur regularly only in the walking sticks. An example of autotomy is presented by the locust; if held by the hind leg and pressure is made on the femur, it will break off this leg. Termites and ants have deciduous wings, which are shed after swarming. 315. Injuries Due to Insects.—Insects affect man injuriously in a great many ways. They may annoy him by their presence or by their bites or stings. The insect may be poisonous and its attack may cause effects which are painful though rarely of themselves serious. Insects may also be the means of transmitting disease-producing organ-. 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 Wolcott, Robert Henry, 1868-1934. New York ; London : McGraw-Hill Book Company, Inc.
Size: 1561px × 1601px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
