1. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. CHAPTER 17 Keys to the Orders of Hexapoda

2. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Is this insect a wasp? Some insects superficially resemble other insects in a relationship called mimicry.

3. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 17.1 Key characters:

4. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 17.2 Key characters: a, larva of Lepidoptera (Noctuidae); b, abdominal leg of larva of Lepidoptera (Noctuidae); c, scarabaeiform grub of Endopterygota (Coleoptera, Scarabaeidae); d, a grasshopper (Orthoptera).

5. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 17.3 Key characters: a, Diplura, Campodeidae; b, forceps of Diplura, Japygidae; c, haustellum of Diptera (Muscidae); d, chewing mouthparts of a grasshopper (Orthoptera); e, raptorial leg of a mantid (Mantodea).

6. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 17.4 Key characters: a, an earwig (Dermaptera); b, a louse (Phthiraptera); c, lateral aspect of the anterior end of a thrips (Thysanoptera); d, a book louse (Psocoptera).

7. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 17.5 Key characters: a, an ant (Hymenoptera, Formicidae); b, a beetle (Coleoptera); c, wings of Neuroptera, showing bifurcating marginal veins (bmv); d, wing of a snakefl y (Raphidioptera), showing pterostigma; e, head of a moth, showing coiled proboscis.