NO. 6 



CATERPILLAR AND BUTTERFLY — SNODGRASS 



37 



Fig. 16. — External changes during metamorphosis of the tent caterpillar, 



Malacosoma americanum. 



A, The mature active caterpillar (length zVa inches). B, Final contracted 

 stage of caterpillar in cocoon. C, The pharate pupa in last larval cuticle. D, The 

 mature pupa. E, The split pupal shell after emergence of the moth (F). G, A 

 larval leg. H, Leg of pharate pupa. I, Head of pharate pupa, anterior. J, Head 

 and thorax of mature pupa, ventral. 



Ant, antenna; E, compound eye; iL, first leg; IbPlp, labial palpus; Lm, 

 labrum ; Md, mandible ; Mth, mouth ; Mx, maxilla. 



