^Explanation of Plate 6. 



Caddis Plies. 



Fig. 



1. Dorsal view of larva of Molaiina cinerea Hagen, x 4. 



2. Lateral view of larva of M. cinerea, x 5. 



3. Lateral view of the pupa of M. cinerea, x 4)^. 



4. Dorsal view of imago of M. cinerea, x 4. 



5. The accustomed resting position of the imago of M. cinerea. 



6. Ventral view of the fiat larval case of M. cinerea, x 2. 



7. Lateral view of larva of Polycentropus lucidus Hagen, showing the very long 



anal prolegs, and the absence of gill filaments, x 5. 



8. Lateral view of pupa of P. lucidus, x 6. 



9. Dorsal view of imago of P. lucidus, x 3^. 



10. Larval case of P. lucidus ; tube composed of sand and silk ; the enlargement 



near the end is two layered, and contains the pupa. 



11. Eggs laid by P. lucidus female on a stick protruding from the water in a breed- 



ing cage. 

 524 



