38 THE BUTTERFLY HUNTERS. 



chrysalis, from which, in proper time, the butterfly comes 

 forth. Can any one tell me," he added, "what the differ- 

 ence is between the caterpillars ? " 



"I can, Sir," said Ben Wait, a rosy, bright-eyed boy 

 who sat in the back part of the room. "The caterpillar 

 of the Asterias is what we call a Parsley-worm. It is 

 green and black. I have often caught it creeping round 

 on Parsley and Caraway in our garden. The Troilus cat- 

 erpillar I have never seen, but my book says it lives on 

 Sassafras-trees, and changes its color four times." 



" That is all correct," said the teacher. " The cater- 

 pillar of the Troilus, like many other caterpillars, sheds 

 its skin, and takes one of a new color, every week of its 

 life. 



"But we will not talk any more about caterpillars now. 

 Some evening, when we have not so many specimens, I 

 will tell you more about caterpillars and chrysalids. 



" Now we will examine this fine specimen of Papilio 

 Asterias. It belongs to the same species as the Turnus 

 butterfly, described in our last lesson. Its wings expand 

 nearly four inches. Its body is black, with two rows of 

 yellow dots on the back. The wings are also black, with 

 a broad band of yellow spots extending from the front 

 edge of the fore wing to the back part of the hind wing, 

 and a row of yellow spots on the margin. The hind 

 wings are tailed, and between the band of yellow and 



