lOi STATES OF INSECTS. 



hours in accomplishing a . In many instances, however, 

 the larva is spared this trouble, one end of the egg being 

 furnished with a little lid or trap-door, which it has but 

 to force up, and it can then emerge at pleasure : such 

 lids are to be found in the eggs of several butterflies and 

 moths, as Satyms Mara, Saturnia pavonia major, &c. 

 and the common louse b . In those exquisitely elegant 

 eg-ffs, before described, of some kind of bird-louse (Nir- 

 mus) found adhering to the base of the neck feathers of 

 the golden pheasant , there is a lid or cap of this kind 

 of a hemispherical form terminating in a tortuous style. 

 Those of a species of bug (Pentatoma Latr.), found by 

 our friend the Rev. R. Sheppard, besides a convex lid 

 are furnished with a very curious machine, as it should 

 seem, for throwing it off. This machine is dark-brown, 

 of a corneous substance, and of the shape of a cross-bow d , 

 the bow part being attached to the lid or pushing against 

 it, and the handle, by means of a membrane, to the upper 

 end of the side of the egg. 



When the included animal has made its way out of 

 the egg, it enters upon a new state of existence, that of 

 Larva, to which I shall direct your attention in the fol- 

 lowing letter. 



a Reaum. ii. 167. 



b Brahm. 249. Rosel. iv. 130. Swamm. Ml. Nat. t. If. 2. 



c By Mr. White, jun. cordwainer at Ipswich. 



d Plate XX. Fig. 16. a. 



