50 



ELEMENTARY STUDIES IN INSECT LIFE 



The Larvae resort to many means to escape enemies. 

 Some emit, noxious juices, some " play 'possum/' some 

 assume an attitude of fierceness, and others simulate 

 objects not subject to attack. 



The Pupa frequently secures protection by assuming 

 on the pupa-case colors closely resembling 1 the support, 

 or by taking the form of some object associated with it. 



FIG. 39. Pupa of interrogation 

 butterfly, showing protective knots 

 or processes at exposed points lia- 

 ble to contact with other bodies. 

 From a photograph. Enlarged. 



FIG. 40. Dorsal view of the 

 pupa of black swallowtail but- 

 terfly on white saucer, showing 

 protective resemblance. Photo- 

 graphed from life. 



The nascent pupa-skin in some insects appears to have 

 the capacity to assume within certain limits the colors 

 of its support. (See Figs. 40, 42, 426.) 



The Adult. Did you ever observe a moderate-sized 

 black or bluish beetle running away from under a 

 stone or board you may have overturned ? Have you 



