182 



rRICIIOPTERA. 



chimney which rises above the surface of the mud, 

 and appears Uke a twig with a hole at its apex. 

 Fig. 131 is the case of a young larva, and in Fig. 132 

 the pupse are seen. r^ 



Sometimes the chimneys 

 have two openings, as 

 shown in Fig. 133. 



The caddis- flies re- 

 verse the order of rela- 



Fig. 129. 



Fig. 130. 



tions as found in the Mecoptera. Their larv^?e do not so 

 closely resemble those of the moths, while, on the other 

 hand, the adults are very much more like the latter than 

 are the adults of Mecoptera. 

 The habits of the larvae liv- 

 ing in tubes or cases would 

 have led to the suppression 

 of the useless abdominal 

 legs, if these ever existed. 



O^ 



Fig. 131. 



Fig. 132. 



