172 THE BUTTERFLY VIVARIUM. 



earth to undergo their final change in a perfectly 

 natural manner, for where there is one Caterpillar, 

 others are sure to be found if properly sought for. 



To return to the coming forth of the Moth. The 

 first symptom will be the appearance of a crack, and 

 then a wider opening down the back of the chry- 

 salis ; as this Avidens, the head and thorax of the 

 Moth will be seen struggling to extricate them- 

 selves, the antennas still closely packed under- 

 neath. By the assistance of the legs, when once 

 freed, the whole of the body is soon drawn 

 out, and the insect generally remains for a 

 short time on the external wall of his prison to 

 rest after his exertions. The wings are at that 

 time still smaller than those represented at No. 3 

 in Plate IV.; but as the newly-formed Moth 

 gathers strength and creeps away from the empty 

 shell, as shown at No. 2, it begins to lift its wings 

 gently, and their growth becomes very rapid, show- 

 ing every marking in a minute form, as in an 

 accurate miniature model. 



Every movement of the newly-born " imago " is 

 now highly interesting, till at last the full propor- 

 tion of the fine wings is attained, and the truly 

 splendid insect attempts to take its first flight, as 

 shown at No. 4 in the same Plate. 



