FORM, GROWTH, AND CHANGE 53 



compound eyes (e) like the dragon-fly's, though not relatively 

 so extensive or prominent. The feelers are many-jointed, 

 showing in butterflies the extremity thickened like a club, 

 bearing in many moths a wealth of sensory bristles, these being 



T 



FIG. 29. 



a, Diamond-back Moth (Plutella maculipennis) b, young caterpillar, dorsal view ; 

 c full-grown caterpillar, dorsal view ; d, side view ; e, pupa, ventral view. x 6. 

 From Carpenter, " Life Story of Insects ". 



in some cases borne on stiff or delicate outgrowths of the 

 segments of the feeler, which thus assumes the appearance of 

 a beautifully moulded comb or feather. But the most striking 

 specializations of the butterfly's head-appendages are seen in 



