CHRYSALIDS. 



125" 



often fly at dusk rather than by day, and many are of 

 a much heavier and thicker make than the Hght 

 graceful Butterflies. 



The Butterfly chrysalids (see Fig. 94) may be known 

 from those of Moths by being much more angular, 

 the rows of ridges scooped out or interrupted at dis- 

 tances, sometimes giving almost the appearance of 

 prickles; -whilst the Moth chrysalids are oval and 

 smoother. 



Fig. 98. — Buft-tip Moth : calerpillar and chrysalis. 



Chrysalids vary very much in their method of rest 

 during this stage. Some, like the Cabbage chrysalis, 

 are slung up by a silken girdle passed round what we 

 may call the waist, which was spun by the creature 

 when about to cast off its caterpillar-skin, as a support 

 during the coming helpless stage ; some hang by the 

 end of the tail from webs ; and many go through their 

 change in a silken cocoon (spun like that of the Silk- 

 worm by a thread from the mouth), or in earth-cells 

 below the surface of the ground. 



In this order a very large part of what we can do to 

 prevent coming attack depends on our knowledge of 

 where the caterpillar turns to the chrysalis state ; 

 that is, whether it buries itself, or forms a cocoon, or 

 hangs itself up in sheltered nooks. 



