HOW TO KNOW THE IMMATURE INSECTS 



65a. Mesothorox and sometimes several other segments bearing fleshy 

 filaments. Fig. 492 Family DANAIDAE 



The caterpillars chiefly 

 feed on milkweeds. The 

 monarch butterly, Dan- 

 aus plexippus (L.) is near- 

 ly a cosmopolitan species. 

 Its caterpillar is black and 

 yellow. The chrysalis is 

 pale green and iridescent. 



Fig. 492. DQnoHS plexippus L. 



65b. Body without fleshy filaments Family NYMPHALIDAE 



Key to the PUPAE of the more important families 

 of LEPIDOPTERA 



(Chiefly from E. Mosher, 1916) 



la. With functional mandibles crossing in front of head. 



Fig. 493 Families MICROPTERYGIDAE & ERIOCRANIIDAE 



^MAfiPiBl^ 



The pupation of Micropterygidae takes place 

 in a dense, parchment-like cocoon. The pupa- 

 tion of Eriocroniidae takes place in a tough 

 cocoon in the groimd. The pupa uses its large 

 mandibles to cut its way out of th^ cocoon and 

 to dig up to the surface. 



Fig. 493. Mnemonico 

 «Hricy«n«a WIshm. 



lb. Without functional mandibles, or indicated only as small tubercles 

 or lobes 2 



2a. 4th abdominal segment movable on the 3rd; or appendages free 

 from fKxch other. 3 



2b. 4th abdominal segment fixed to 3rd; appendages fused to each 

 other. 19 



173 



