PLATE XL 



CADDIS-FLIES, &c. 



FIG. PAGE 



1. Oxythira albiceps (magnified) 90 



2. ,, ,, larva in case (magnified) 90 



3. ,, ,, pupa in case (magnified) 91 



4. Helicopsyche (magnified) 70 



5. „ larva withdrawn from case (magnified)... 70 

 0. ,, larva in case (magnified) 70 



7. Hydropsyche colonica g- 82 



8. ,, ,, larva (magnified) 82 



9. Poly centr opus puerilis 83 



10. ,, ,, larva (magnified) 84 



11. Hydrobiosis umbripennis 86 



12. ,, ,, larva (magnified) 86 



13. ,, ,, pupa in inner cocoon (magnified) 87 



14. Gill of Ichthybotus Imdsoni (highly magnified) 28 



15. ,, Oniscigaster distans (highly magnified) 43 



16. ,', Ameletus perscitus (highly magnified) 40 



17. ,, Goloburiscus humeralis (highly magnified) 36 



18. ,, Atalophlebia dentata (highly magnified) 31 



