Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . FIG. 44.—Incomplete metamorphosis of the common red-legged locust, Calop-tenus femur-rubrum. 1, la, 2, 26, 2c, the two larval stages; 3-5, the threepupal stages; 6, 6a, the adult.—Emerton del. (To face page 61.) HABITS OF LOCUSTS. 61 stage, and as the locust moults twice afterwards before thefinal imago stage is reached, it may be said to have threepupal stages. When we compare the freshly-hatched larvawith the adult, we see that the only important difference isthe presence of wings. There is no great
Entomology for beginners; for the use of young folks, fruitgrowers, farmers, and gardeners; . FIG. 44.—Incomplete metamorphosis of the common red-legged locust, Calop-tenus femur-rubrum. 1, la, 2, 26, 2c, the two larval stages; 3-5, the threepupal stages; 6, 6a, the adult.—Emerton del. (To face page 61.) HABITS OF LOCUSTS. 61 stage, and as the locust moults twice afterwards before thefinal imago stage is reached, it may be said to have threepupal stages. When we compare the freshly-hatched larvawith the adult, we see that the only important difference isthe presence of wings. There is no great change, such as marks the life-historyof a butterfly. Perhaps it is by reason of their incompletemetamorphosis, the general uniformity of their habits, andtheir living on vegetable food, that Orthoptera are notnumerous in species compared with the beetles and higherorders. The locusts lay their eggs in packets in the ground(Fig. 45). With its ovipositor, which is made up of. FIG. Mountain locust laying its eggs (c) one by one, forming an ovalmass. All natural size.—After Riley. three pairs of short spines, the two outer pairs very largeand stout, the locust thrusts its hind body deep into theearth and deposits a packet of eggs. Many dangers attend the life of these insects. To over-come or to avoid them, many of them, as certain katydids,the leaf-insects, and the stick-insects, mimic leaves andsticks, so that insectivorous birds are deceived by them. Locusts are also attacked by parasites: little red mitesstick to their bodies; hair-worms, and especially the mag- 62 ENTOMOLOGY. got of the flesh-fly, infest them, and thus thousands of themare swept away. All this is of use, however, for were itnot for the kindly aid thus rendered, the earth would beeach year overrun with locusts. The males of many Orthoptera, as the crickets, greengrasshoppers, katydids, etc., and locusts, produce loud,shrill sounds, by which they attract the females; but in th
Size: 1828px × 1367px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, bookpublishe, booksubjectinsects
