174 THE BUTTERFLY VIVARIUM. 



It was turned up while digging potatoes, on the 

 foliage of which (its favourite food) it had evidently- 

 feasted till fall grown, and then buried itself in the 

 earth to undergo its change to the chrysalis and 

 eventual winged state. I immediately made a 

 careful drawing of the Caterpillar, to add to my 

 collection of drawings of that kind. When fully 

 extended, it was more than five inches in length, 

 the colouring being a bright apple-green, shading to 

 yellow as it approached the dark diagonal stripes. 

 The three sections next the head, and the one next 

 the tail, were of a bluer green than the rest of the 

 body, and devoid of the small black tubercles that 

 are thickly sprinkled with symmetrical precision 

 over the other divisions. The dark diagonal stripes 

 of rich violet have a streak of white behind them, 

 and shade off in front to a pale bluish tone. The 

 spiracles, or breathing pores, situated above each 

 foot, arc black, surrounded by a ring of white, while 

 the singular caudal appendage, or tail, is of a dull 

 orange. When in motion, this beautiful Caterpillar 

 exhibits its markings to great advantage; the 

 alternate extension and compression of the ridges 

 of each segment giving a beautiful play to the 

 maculations, almost such as one observes in the skin 

 of the Tiger when he paces his den with that sin- 



