
432 THE INSECT WORLD. 
The Hydropsyches (Fig. 420) and Rhyacophili (Fig. 421) are 
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Fig. 420.—Hydropsyehe (Phryganea) atomaria, larva, pupa, imago, and larva-ease. 
| lable . e . . 
My small insects which resemble the Plryganee very closely. Their 
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{ Fig. 421.—Rhyacophilus vulgatus, arva, pupa, cocoon, and imago (male). 
| larve have, for the purposes of respiration, some gills, others re- 

