64 (1N.VT PUPA. 



posed of hairs arranged in a star-like form and anointed with 

 an oil by which they repel water. When tired of suspension 

 near the surface, our little swimmer has only to fold up these 

 divergent hairs, and plump, he sinks down to the bottom. He 

 goes, however, provided with the means of re-ascension, a 

 globule of air which the oil enables him to retain at his funners 

 ends ; on re-opening which he again rises whenever the fancy 

 lakes him. But yet a little while, and a new era arrives in 

 the existence of this buoyant creature : buoyant in his first 

 >l age of Larva, in his second of Pupa he is buoyant still. 

 Yet, in resemblance, how unlike ! But lately topsy-turvy, his 

 altered body first a^mnes what we should call its natural 

 position, and he swims, head upwards, because within it there 

 is now contained a different, but equally curious apparatus for 

 inhaling the atmospheric fluid. Seated behind his head, arises 

 a pair of respirators, not very much uidike the aural appendages 

 of an ass, to which they have been compared ; and through these 

 he feeds on air, requiring now no grosser aliment. At his 

 nether extremity there expands a iish-like tinny tail by help of 

 which he can either float or strike at pleasure through t he- 

 water. 



Thus passes with our buoyant Pupa the space of about a 

 week; and then another and a more important change comes 

 " o'er the spirit of his dream." AVith the gradual development 

 of superior organs, the little spark of sensitivity within seems 

 wakened to a new dt>ire to rise upwards. Fed for a season upon 



