378 ORDERS OP PTILOTA. 



are preyed upon by the grubs when hatched. Others de- 

 posit their eggs in the leaves or stems of various plants. 



Fiinpla manifestator depositing its eggs in wood lan'ee. 



together with an irritating matter, which causes the pro- 

 duction of galls or wai-ts, often of a large size, upon the 

 substance of which the larvae, when hatched, continue to 



Oak-apple and Cyuips quercusfolii. 



feed until they assume the perfect state ; and the remainder 

 place their eggs in slits in the stems of plants, upon the 



