37 



and, if the insects be pierced through the side, it 

 will, in a great measure, prevent their fluttering 

 and injuring themselves. 



Order 8. TRICHOPTERA. Things four, mem- 

 branaceous; the Pterigostia or wing-bones, hairy ; 

 mouth with maxillae and lip ; antennce inserted 

 between the eyes, often very long, composed of 

 an infinity of joints ; feet elongate, spinulose ; 

 tarsi elongate, five-jointed ; the last joint with 

 two small nails. [PI. II, fig. 8.] 



The Phryganea of Linne constitutes the in- 

 sects of this order ; in the larva state they are 

 known by the name of cad-bait, or caddis-worms. 

 The larva is elongate, agile, somewhat cylindric, 

 composed of twelve joints, the three first harder 

 than the rest, and each bearing a pair of feet ; 

 the last segment with two hooked processes: in- 

 habits tubes constructed of sand and bits of 

 wood, shells, stones, or grass, glued together 

 by a cement impenetrable to water. The pupa, 

 which somewhat resembles the perfect insect, 

 remains shui: up in the tube it inhabited whilst a 

 larva, but has the power of motion ; prior to 

 emerging from the water (in which it resides) 

 it comes to the surface for the purpose of 

 changing into the fly state. The perfect insects 

 inhabit trees and shrubs ; and many will be found 

 D 



