474 APPENDIX. NO. I. 



All these produce flies with very large wings, [like those of butterflies^ 

 The nympbe of these (which, are to spring from those small wornn 

 and which like tortoises carry their houses about with them ; within 

 which they turn into nympha ; from which nympha, afterwards spring 

 little flies,) Dr. Swammerdam refers to his fourth order of transmuta- 

 tions, whereas, in my opinion, they belong to the third, because they 

 change their skin twice. 



Another translation of this Synopsis, too copious to be here inserted, 

 together with many curious particulars concerning Aquatic Insects, is to 

 be found in the Natural History of Northamptonshire, by the Rev. John 

 Morton, chap. 7. 



