104 CABBAGE BUTTERFLY CHRYSALIS. 



of. Here is the very thing ! Just under the coping of the 

 wall, its only shelter, slung in horizontal position, hangs a 

 chrysalis, which by its shape, angular instead of rounded, as 

 well as by the open mode in which it is exhibited, we recognise, 

 at once, as a future Day-flier ; and by the colour, a greenish 

 yellow, besprinkled with black, no less than by its choice of 

 situation, know it to have been, in autumn, a Cabbage Cater- 

 pillar, to appear in spring (though not perhaps till May) a large 

 white garden Butterfly. It hangs here attached to the wall by 

 a double support, a silken button at the tail, and a band or 

 loop of threads round the middle of the body, its last pieces of 

 ingenious workmanship while in the Caterpillar form ; and we 

 perceive, also, a thin silken web stretched over a small space 

 of the brick above. This is a preparation of its surface to 

 receive the ends of the supporting girth, which would not else 

 adhere. On this last practice of the Cabbage Caterpillar, a 

 curious observation has been made, serving to illustrate the 

 variations of instinct to meet unusual circumstances. When 

 confined in a box covered with muslin, a texture to which its 

 sdlken girth can be easily attached without any previous pre- 

 paration, the caterpillar has been found to spare itself the 

 needless trouble of spining any such facing web. We have 

 one now in our possession in a box, where the web certainly 

 has been spun, but our chrysalis being attached by its means 

 to the paste-board side, and not to the muslin top of its apart- 

 ment, offers no contradiction to the preceding statement. 



