An Introduction to entomology
Comstock Publishing Company, 1920 - 220 pages
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abdominal adult alimentary canal antennæ appears appendages applied base bears become believed body body-wall branches cavity cells changes characteristic chitinous closely cocoon common commonly comparatively composed compound eyes connected consists cuticula described designated Diptera discussed distinct division eggs example exist extends external fact female Figure fore front function ganglia ganglion glands greatly hairs head heart hypodermis indicated insects instar internal invagination known larva larvæ lateral layer legs less light male margin membrane metamorphosis molting muscles musical naiads nerve nervous system nymphs ocelli orders organs pair pass plates portion position possess present produced pupa referred regarded represented reproductive sclerites segment separated serve shown side single situated sound specialized species spiracles stridulating structure surface takes place termed third thorax trachea tubes usually varies veins ventral vibration wall wings writers
Page 181 - that at whatever age a variation first appears in the parent it tends to reappear at a corresponding age in the offspring.
Page 190 - through a T-shaped opening, which is formed by a lengthwise split on the back near the head end and a crosswise split at the front end of this (Fig.
Page 26 - three pairs of legs, and usually one or two pairs of wings in the adult state. The
Page 93 - which sounds like xr, has a shocking lack of melody; the poets who have sung its praises must have heard it at
Page 1 - a scorpion, a centipede, or a lobster be examined, the body will be found to be composed of a series of more or less similar rings or segments joined together; and some of these segments will be found to bear jointed legs (Fig. i). All
Page 41 - or club-shaped, in which the segments become gradually broader, so that the whole organ assumes the form of a club. 7. Capitate or with a head, in which the terminal segment or segments form a large knob. 8. Lamellate
Page 88 - stridulates to encourage the female in her work and from distress when she is removed
Page 103 - is excreted through two openings, one on each side of the lower side of the body near the middle coxae; in
Page 119 - lessen the specific gravity of the insect they probably aid in flight; as filling the lungs with air makes it easier for a man to float in water; in
Page 41 - Pectinate or comb-like, in which the segments have long processes on one side, like the teeth of a comb.