INSECTA 



455 



semble their adults in body form, type of mouth parts, and the 

 possession of compound eyes, and are known as nymphs (Fig. 317). 



Fig. 317. Metamorphosis of a capsid bug {Plesiocaris vagicollis). After 

 Petherbridge and Hussain. 1-4, nymphal instars; 5, imago. 



The orders composing the Holometabola are the Neuroptera, 

 Mecoptera, Trichoptera, Lepidoptera, Coleoptera, Strepsiptera, 



