10 "stung" caterpillars. 



Many pupae, especially of the larger moths^ 

 are also lost through the means of some ich- 

 neumon fly, which has laid its eggs within 

 them. 



It is impossible to detect a " stung " cater- 

 pillar until it has ceased feeding, and not always 

 easy to detect it even at that time. Often the 

 caterpillar changes into a chrysalis without 

 betraying any signs of the mortal injury that 

 it has sustained ; but, when the time arrives for 

 the appearance of the insect, the disappointed 

 collector finds that instead of the moth the 

 ichneumon fly occupies the box. 



In such a case the ichneumon should always 

 be killed and preserved, together with the chry- 

 salis from which it emerged, so that in process 

 of time a valuable collection is formed of moths 

 and the various species of ichneumon which 

 infest them. 



In the illustration on page 8, the reader will 

 see a figure of the ichneumon fly which attacks 

 the Death's-head Moth, fig. 3, the pupa being 

 shown in fig. 2. 



We will briefly take notice of one or two 

 insects which ought not to be entirely passed 

 over. One is the Privet Hawk Moth {Sphinx 



