1. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. CHAPTER 21 Order Odonata (Dragonflies and Damselflies)

2. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. This delicate damselfly, Hetaerina americana (Calopterygidae), is clinging to streamside vegetation. Unlike dragonflies, most damselflies hold their wings upright, pressed together, when at rest.

3. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.1 Adult dragonflies: a, Anisoptera, Macromiidae (Macromia magnifi ca); b, Petaluridae (Tanypteryx hageni); c, Zygoptera, Coenagrionidae (Argia); d, Lestidae (Archilestes).

4. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.2 Venation at base of wings of dragonflies: a, Gomphidae (Ophiogomphus); b, Libellulidae (Erythemis).

5. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.3 Copulation in Odonata:

6. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.4 Anisoptera heads:

7. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.5 Ventral aspects of labia of naiads of Odonata: a, Cordulegastridae (Cordulegaster); b, Libellulidae (Tarnetrum); c, Lestidae (Lestes); d, Coenagrionidae (Argia).

8. Introduction to Insect Biology and Diversity, 3/e James B. Whitfield / Alexander H. Purcell III Copyright © 2012 by Oxford University Press, Inc. Figure 21.6 Naiads of Odonata: a, Anisoptera, Libellulidae (Libellula); b, Zygoptera, Coenagrionidae (Argia).