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them, I found, to my great furprife, that having left the box which 

 contained them open to give them air, they had all crept out of 

 the box, and it was not till after a diligent fearch, that I found 

 many of them (for they had been fifty in number), in the corners 

 and chinks of my fcrutoire : they had in thefe five days grown to 

 fuch a fize, that each of them was as long as one of my nails ; and 

 the reafon of their quitting the box, 1 concluded to be, that having 

 grown to their full fize, and requiring no more aliment, they con- 

 cealed themfelves in holes and corners, in order to undergo their 

 next transformation. 



The next morning, being the firft of Auguft, one of thefe mag- 

 gots, whofe body had been lliarp or pointed at one end, was con- 

 traded one third in length, fo as to be of an equal thicknefs at each 

 end, and exhibited the figure of a fmall barrel : in the afternoon of 

 the fame day, four others of the maggots had alfumed the fame Ihape, 

 and they were changed from their original white, to a yellowilh 

 colour : the next day they became red, and fo all the maggots, from 

 day to day, changed from a yellowifli to a red, and at length to a 

 blackifh colour. 



Two of thefe cryfales or grubs I put into a glafs, and carried 

 about in my pocket, with intent to expedite their change into Flies, 

 but after five or fix days, I found the heat was injurious to them, 

 for they began to flirivel up, and confequently, I judged, would not 

 produce any living creature. The others I placed on a paper, co- 

 vering them with a glafs, and at the end of nine days, I opened 

 three of them, and took out of each a perfectly formed Fly, but 

 very moift, and without any motion that I could difcover ; they 

 were inclofed in a thin membrane, befides the outfide hard fliell 

 which contained them. I could not at firfl; difcover their wings, 

 but examining them more narrowly, I perceived the wings folded in 

 exad order on their bodies, and having feparated them from the 

 bodies, I found them to be perfedly formed ; upon opening the 

 bodies of thefe unborn Flies, I took out of one of them a great 

 quantity of eggs. 



