CATERPILLARS OF THE ORANGE-TIP BUTTERFLY
213
my window-sill. I placed it carefully on another sprig, but noted that it had a small oozing injury on its right dorsal first segment behind the head. Later that day the victim changed its skin, (whether or not prematurely, I cannot teil), and then showed a black mark on its head in an anterior dorsal position, slightly to the right, (the new head, being larger than the old, is formed inside the first segment of the old skin). This Caterpillar then proceeded to feed normally, and to pupate to an unmarked chrysalis. I have kept it separately, but think it unlikely that the butterfly will bear any scars from its childhood fight.