Introduction to Australian Insects (Revised Edition) by Phillip W. Hadlington & Judith A. Johnston

By Phillip W. Hadlington & Judith A. Johnston

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Extra info for Introduction to Australian Insects (Revised Edition)

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It is more delicate in appearance than the dragonfly. Both nymphs (aquatic) and adults are predatory. Zygoptera - Odonata - 45 mm 11 The ringant termite, a pest of trees, lives in small groups or colonies within the tree. This is a soldier with dark head and large mandibles. Neotermes insularis - Kalotermitidae Isoptera - 12 mm 12 The subterranean termite showing its various castes, the queen, soldiers and winged forms. The queen was once the size of the winged reproductive. ] page_18 13 Niggerhead termites infest trees.

In the Anisoptera (dragonflies) the gills are within the rectum (the end of the gut) and by pumping water in and out the nymph can shoot along by jet propulsion. Nymphs hunt insects, tadpoles and other animals. An extension of the lower lip, the mask, is folded beneath the head and shot out to capture prey which are seized by two curved, moveable teeth at the end. The length of the life cycle and the number of moults varies with conditions but is often complete within 1 to 3 years. The nymph climbs a plant stem and the adult emerges leaving the shed skin firmly attached to the plant.

Egg masses often have small round holes on the surface. These are the emergence holes of parasitic wasps which have destroyed the mantid eggs. Order Orthoptera Crickets, Grasshoppers, Locusts Mostly medium sized insects; no distinct constriction between head and thorax; antennae thread-like, long or short; compound eyes usually quite large; chewing (mandibulate) mouthparts: foresection of thorax well developed; enlarged hindlegs modified for jumping; forewing thickened (tegmen), hindwing membranous, wings sometimes reduced or absent; cerci present; females usually with long ovipositor (egg layer).

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