224 NATURAL HISTORY OF AQUATIC hXSECTS CH. 



Fig. 79-— Agriotypus armatus. A, imago; B, pupa ; D, larva ; E. AgriotiTiised case 

 of Silo ; G, section of ditto, showing e'l, fore operculum ; ni', hind ditto of case ; 

 s, remains of Silo larva ; ii£, pujia of Agriotypus ; e, remains of cast larval skin 

 of ditto. From Klapalek. 



