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abdominal adult alimentary canal anal animals antennŠ appears appendages applied arthropods base bears become body body-wall branches cavity cells changes characteristic chitinous closely cocoon common commonly comparatively composed compound eyes connected consists corresponding cuticula described designated Diptera discussed distinct division eggs example exist extends external fact female Figure fore four frequently front function glands greatly grouped hairs head hind indicated insects instar internal known larva larvŠ lateral layer legs less male mandibles margin maxilla membrane ment metamorphosis muscles nerve nymphs ocelli orders organs pair plate portion position possess posterior present produced pupa referred regarded region represented reproductive organs sclerites segments separate serve shown side single situated sound specialized species spiracles structure surface suture takes place termed third thorax tracheŠ usually vary veins ventral vibration wall wings writers
Page 173 - that at whatever age a variation first appears in the parent it tends to reappear at a corresponding age in the offspring.
Page 18 - three pairs of legs, and usually one or two pairs of wings in the adult state. The
Page 85 - which sounds like xr, has a shocking lack of melody; the poets who have sung its praises must have heard it at
Page xiii - 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 33 - 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 80 - stridulates to encourage the female in her work and from distress when she is removed
Page 95 - is excreted through two openings, one on each side of the lower side of the body near the middle coxae; in
Page 111 - 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