374 



ZOOLOGY. 



branous towards their extremities, become hard and opaque at 

 their base, and are then called semi-elytra. 



There are insects in which the wings, instead of being 

 laminated, are cleft into a number of membranes, barbed on 

 the edges like feathers, disposed like a fan. This may be 



/"\\ 



Fig. 347. Morpfie. 



Fig. 348. Capricorne Charpentier. 



seen in the genus pterophore and orneode (Fig. 349). 

 Finally, when the posterior wings are wanting, they are 

 usually replaced by two small moveable filaments, terminated 

 lilse-*-club, and named balances (Fig. 350). 



Fig. 349. Oroeode. 



517. The abdomen of insects is composed of a consider- 

 able number of rings, moveable on each other. As many as 

 nine may be counted, and when there are fewer it seen 

 some had become fused. In the perfect insect, these rings or 



