TRICHOPTERA. 



179 



being the largest. The mouth parts are very small 

 and weak, and are used for suckmg rather than biting. 

 Burmeister and Westwood state that caddis-flies do 

 not take any food, and according to Dr. Hagen the 

 larger part of Phryganeidae take no nourishment ex- 

 cept, perhaps, some fluid. The wings are hairy, — 

 hence the name Trichoptera {Bpi^, a hair ; -n-repov, a 



Fig. 126. 



Fig. 125. 



Fig. 127. 



wing) given to these insects, — and have but few cross- 

 veins, resembling in this respect the wings of moths. 



The larva of Anabolia (Fig. 125) is like a cater- 

 pillar in shape. The head and thorax are brown and 

 more or less chitinous, but the abdomen is light- 

 colored, soft, and defenceless. At first the insect is 

 white ; but when exposed to attrition and the action 

 of the atmosphere the forward parts of the body 



