472 SYNOPTIC COLLECTION. 



has been carried back from the pupal stage to the early 

 life of the larva which is what we should naturally expect 

 to find in the specialized orders of insects. 



The abdomen is provided with five pairs of fleshy prop- 

 legs, each supplied with many hooks. 



According to Scudder the bright colors of the young 

 Danais may be considered as warning colors indicating 

 the unpalatable nature of the animal. While this cater- 

 pillar is without tubercles, it has a pair of fleshy filaments 

 extending from the anterior and posterior parts of the 

 body that are not present in the young larva but which 

 develop in the process of growth. 



The mature larva fastens itself by the tail only, the 

 girt around the middle being no longer necessary, and 

 transforms to the beautiful bright green chrysalis (No. 

 1207 ; PI. 1206, fig. 4) marked by brilliant golden spots. 

 The appendages are encased in sheaths and fastened to 

 the body. 



The adult (No. 1207, 9 ) has a cylindrical body cov- 

 ered with a coating of hairs and scales. When this coat- 

 ing is removed, the three regions are found to be somewhat 

 loosely connected and the mesothorax and metathorax (PI. 

 1206, fig. 5), although more complex than in most of the 

 generalized insects, are still capable of considerable 

 motion. 



The head is freely movable, although in a lesser degree 

 than that of dragon-flies. This freedom is partly due to 

 the free prothorax which in the Lepidoptera is reduced, 

 as we have already seen, to a mere collar-like segment 

 (fig. 7,/; see also fig. 5). The deep groove between the 

 mesothorax (fig. 7, ms) arid metathorax (fig. 7, mt\ 

 shaded in fig. 5), and the power possessed by these two 

 segments of moving upon each other are probably due to 

 the peculiar wave-like motion of the insect which is in 

 striking contrast to the swift, arrow-like flight of the 

 dragon-fly. 



The compound eyes constitute about two thirds of the 



