An Introduction to Entomology, Part 1

abdominal segment accessory adult insects alimentary canal anal antennæ apodemes appendages body body-wall branches caudal cavity chitinous chordotonal organs cocoon Coleoptera Collembola complete metamorphosis compound eyes connected consists cornea coxa cross-vein crystalline-cone cuticula described different insects Diptera distinct dorsal ecdysis eggs extends external female Figure fore wing fore-intestine function ganglia ganglion glands head hind histoblast Hymenoptera hypodermis immature instars insects instar invagination labium larva larva of Corydalus larvæ lateral layer legs Lepidoptera longitudinal M₂ male mandibles margin maxilla membrane mid-intestine molting mouth-parts muscles naiads nerve nerve-ending nervous system nymphs ocelli ommatidia ommatidium orders of insects Orthoptera ovarian tubes ovary pair portion posterior produced pupa pupæ pupal R₁ represented reproductive organs rhabdom sclerites scolopale scolopophores seta setæ side species spiracles stadium stridulating stridulating organs structure surface suture tentorium tergum termed thoracic Thysanura trachea tracheal gills tympana varies greatly veins ventral vibration visual cells viviparous wall wing-buds