CHAPTER XIX. 



ORDER IX. TRICHOPTERA ( Kirby). 



The English have given the name caddiceflies to the insects of this order. The consistence 

 of the body of the perfect insect is considerable, and besides they are thickly clothed with 

 hair. Their eyes are rather prominent and large, and they are provided with three ocelli. 

 Their antennae are variable in length, being sometimes much longer than the body ; at 

 others, shorter. They have four membranous wings ; the front ones are fibrous, and the 

 nerves are branching : the posterior wings are the largest, and folded when at rest. The 

 mouth is imperfect and unfitted for mastication, the mandibles being only rudimental. 

 The maxillary palpi are long, and almost setaceous. The larva has six legs : it resides in 

 a case in water, which it forms of little fragments of shells, or of sand or sawdust. The 

 mature insect is often employed as a fish-bait. 



Phryganea semifasciata (Say). (Plate xxxii, figs. 9 k 10.) 



Color brownish or ferruginous. Wings ferruginous, marked with irregular black lines and 

 a distinct point near the inner and basal angle : inferior wings light ferruginous or 

 yellowish ; the hindwings have a dilated mark near the inner margin. 



