PACKARD.] PHRYGANIDEA CALIFORNICA. 809 



Mr. Behrens, of San Francisco, writes me that three generations of 

 the Phryganidea appear in a year. "In 1875 it, with the larva of the 

 Gastropacha californica, ate our evergreen oaks to broomsticks. You 

 could hear the caterpillars eat and their manure drop, the latter cover- 

 ing everything ; it could be swept together by the bushelful. In the 

 wake of both followed ichneumon parasites." 



