FORM. 37 



specially large stigmata at the tail so that the maggot may lie embedded 

 in liquid and still obtain air. 



These modifications are necessitated by the search for food ; others 



FIG. 47. 



ff Caterpillar) specially adapted to cling tightly to leaf. 



are of use in conferring immunity from foes. " Cryptic form " is most 



FIG. 48. 

 Leaf Insect. 



