III.] 



METAMORPHOSES OF INSECTS. 



57 



in length, something like a barrel, surrounded by 

 four bands or hoops of long vibratile hairs or cilise. 

 There is also a tuft of still longer hairs at the 

 narrower posterior end of the body. Gradually a 

 number of minute calcareous spines and plates make 



41 



FIG. 41. Comatula rosacea (after Forbes). 



their appearance (Fig. 43) in the body of this larva, 

 and at length arrange themselves in a definite order, 

 so as to form a bent calcareous club or rod with an 

 enlarged head. 



As this process continues, the little creature gradu- 



