S 28 



■Microscopical Essays. 



the wings of the moth may be di (covered, is -quite immoveable, 

 but the pofterior part is moveable. The anterior end of this 

 pupa is furnifhed with two horns, one above the other, under the 

 eyes ; there are alfo on it's back feveral rows of points one under 

 the other, the points directed towards the tail. The pupa re- 

 mains in it's cafe for fome weeks • as foon as the moth that is 

 formed therein finds itfelf enabled to break the bonds by which it 

 is confined, it begins -to agitate itfelf within the cafe ; the points 

 are then rendered of effential fervice, thofe on the back ferve as a 

 fulcrum, to prevent it's flipping backwards, while it is opening the 

 hole of the cone with thofe on the head. 



The new-formed moth labours in general about a quarter of 

 an hour before it can effectually open the cafe. This being done, 

 by redoubled efforts it enlarges the hole, and preffes itfelf for- 

 wards, till it arrives at the edge, where it makes a hidden flop ; 

 for if it advanced further it would fall to the ground, and proba- 

 bly lofe it's life, or be materially injured by the fall. Here then 

 the pupa repofes itfelf for a time, after which the moth begins to 

 difengage itfelf from the bonds which confine it; when it has 

 efcaped from the pupa, it fixes itfelf againft the trunk of the 

 tree, with the head upwards, and often remains in this fituation 

 for fome hours, during which time the wings and members are 

 perfeaiy developed, and rendered fit for atom I have been in- 

 formed by Mr. Marfham, that it generally puihes at leaft one- 

 third of the cafe out of the hole before it halts. 



Descrip 



