An Introduction to entomologyComstock Publishing Company, 1920 - 220 pages |
Common terms and phrases
abdominal segment accessory veins adult insects alimentary canal anal antennæ apodemes appendages arthropods axillary bears Berlese body body-segments body-wall branches caudal cavity cells chitinous chordotonal organs cocoon Coleoptera Collembola compound eyes consists cornea coxa cross-vein cuticula described different insects Diptera distal distinct dorsal ecdysis eggs epithelium female Figure fore wing fore-intestine function ganglia ganglion glands hairs head hind histoblast Hymenoptera hypodermis immature incomplete metamorphosis instar invagination labium larva larvæ lateral layer Lepidoptera longitudinal Machilis male mandibles margin maxillæ median mid-intestine molting mouth-parts muscles naiads nerve nervous system nymphs ocelli œsophagus ommatidia ommatidium orders of insects Orthoptera ovarian tubes pairs of legs plates portion posterior produced pupa pupæ pupal represented reproductive organs respiratory organs rhabdom sclerites scolopale scolopophores sense-organs seta setæ side species spiracles stridulating stridulating organs structure suture tentorium tergum termed thorax Thysanura tracheæ tracheal gills tympana usually vary greatly ventral vibration wall
Popular passages
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.