. Animal biology. Zoology; Biology. L a brum Mandible Moixilla Femur Sp/rac/es Labiuni Tibial Tarsus Fig. 170.—Diagram of a locust with parts of the body separated to show metameres and other structures. Abdominal metameres numbered in reman numerals. {Modified from several previous authors.) are tactile, olfactory, or auditory in function. The difference in structure of those of the male and female frequently serves to distinguish the sexes. The mouth parts of insects are of two distinctly different types, one fitted for biting, the other for sucking. The former are referred to as mandibulate
. Animal biology. Zoology; Biology. L a brum Mandible Moixilla Femur Sp/rac/es Labiuni Tibial Tarsus Fig. 170.—Diagram of a locust with parts of the body separated to show metameres and other structures. Abdominal metameres numbered in reman numerals. {Modified from several previous authors.) are tactile, olfactory, or auditory in function. The difference in structure of those of the male and female frequently serves to distinguish the sexes. The mouth parts of insects are of two distinctly different types, one fitted for biting, the other for sucking. The former are referred to as mandibulate, the latter as suctorial. Mandibulate insects (Fig. 171) possess an upper lip, or labrum, and a lower lip, or labium. Between these and meeting in the median line are two strong jaws, or mandibles, and behind the mandibles is a pair of maxillae. Both the maxillae and the labium bear jointed organs known as palpi. The mandibles are used for chewing and work transversely, the labrum and labium preventing the escape of the food from between them. The maxillae help to feed the food into the man- dibles, while the palpi are sensory, sending impulses into the nerv- ous system which determine the activity of the other mouth. Compound eye Anfenna Clypeus Mandible Labrum Moxilla Labium Maxillary palpus Labial palpus Fig. 171.—Front view of the head of a lubber grasshopper, Brachystola magna Girard, from Nebraska. X 3}-^. Illustrates biting mouth 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.
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Keywords: ., bookcentury1900, bookcoll, booksubjectbiology, booksubjectzoology
