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abdominal segment adult insects alimentary canal anal antennae apodemes appendages arthropods axillary bears body body-segments body-wall branches cavity cells chitinous chordotonal organs cocoon Coleoptera complete metamorphosis compound eyes connected consists cornea Corydalus coxa cross-vein cuticula described different insects Diptera distal distinct dorsal ecdysis eggs extends external female Figure fore wing fore-intestine function ganglia ganglion glands hairs head histoblast Hymenoptera hypodermis immature insects instar invagination labium larvae lateral layer Lepidoptera longitudinal male mandibles margin maxilla median membrane ment mid-intestine molting mouth-parts muscles naiads nerve nervous system nymphs ocelli oesophagus ommatidia ommatidium orders of insects Orthoptera ovarian tubes pairs of legs portion posterior produced pupa pupal represented reproductive organs respiratory organs rhabdom sclerites scolopophores sense-organs setae side species spiracles stridulating stridulating organs structure surface suture tentorium tergum termed thorax Thysanura tracheae tracheal gills tympana usually vary greatly veins ventral vibration wall wing-buds 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 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