Dlameslnae . The Immatui^ stages of this subfamily are primarily 

 cold water inhabitants and are phytophagous. Severed, species of this 

 group were found in riffle areeis. They have not previously been recorded 

 in California. 



Tendipedinae . Meuibers of this subfamily, particuleurly Tendipes 

 plumosTxs , have frequently been identified as pollution indicators. How- 

 ever, this species occurred in obviotisly unpolluted water at Redding (mile 

 295.5). 



In the Sacramento River, Calopsectra was found in the riffle 

 areas. Members of this genus aj:^ phytophagous. They spin a horn-shaped 

 case which holds a fine web for collecting algae and detritus for food. 

 The posterior portion of the case is anchored to a rock for about one 

 quarter of its length, while the remainder usually turns upwards and faces 

 the current. At pupation, the open end is covered with silk, except for 

 a small hole in the middle which permits the exposure of the pupal respira- 

 tory organs. 



The larvae and pupae of severcJ. species of Cryptochironomus 

 were found regiolarly, but one deserves particular notice. The Immature 

 stage of this species certainly, and the advilt in all probability, remain 

 undescribed. The toxonomlc distinctiveness of this individual makes it 

 recognizable at a gleince. The antennae are quite long, and the antenna! 

 blade arises at the distal part of the second segment. The maxillary 

 palpi are equa l ly as long as the antennae, lending the first impression 

 of two pairs of antennae. The anterior pair of prolegs does not appear 

 to be present, but rather appears as two brown longitudinal rods interior 

 to the Integument on the prothoracic segment. The posterior prolegs are 



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