bfei 





239 

 Denning: Trichoptera 



Fig. 10:2. Representative Trichoptera cases, a, Phryganea; b, Mystacides; c, Limncphilus; 

 d, Mystacides longicornis; e, Chimarra; i, Hesperophylax designatus; g, Limnephilus; h, G/osso- 

 soma; ;', Ocrirofr/cri/a; /', Neophylax; k, Lepidostoma (a,f y /, Betten, 1934; b,c,e,g, Pennbk, 1953; 

 d, Denning, 1937; h,i, Ross, 1944; k, Hickin, 1952). 



: which consists of an oval top made of stones and a 

 ventral strap made of the same material. The larva 

 proceeds with its head and legs projecting down in 

 ! front of the strap and the anal hooks projecting down 

 j at the back of the strap. For pupation, the strap is 

 cut away and the oval dome is cemented to a support, 

 the pupa being formed in the stone cell thus made 

 (fig. 10:2A). 



"Purse-Case Makers. — Following exactly the same 

 principle as the above are many cases of the Hydrop- 

 tilidae. In general appearance they resemble a purse. 

 The larva occupies the case with the head and legs 

 projecting out of a slit in the front margin while the 

 anal hooks project out of a slit in the posterior mar- 

 gin. For pupation, however, the case is cemented 

 along one side to a support and the slits are cemented 



