APPENDIX. 



So. I. 

 ( Referred to from the end of Part I.) 



A SYNOPSIS OF AQUATIC INSECTS, COVERING 

 THEMSELVES WITH CASES. 



W'ater insects 

 that cover 

 themselves 

 with cases, 

 have a case 

 either 



bodv'eS- 



being affixed 



e compressed, 

 without little threads. 



Or moveable, portable and migratory, called".PAr^-/eff," 

 vutg. " acad-case," which is furnished with little threads, 

 as well on the back as the sides, by means whereof 

 they adhere firmly to their cases, excepting only their 

 head and feet; with three small protuberances pro- 

 jecting beyond the feet, which they can erect, or put 

 forth at pleasure, to hinder their cases from pressing 

 down on their heads as they creep, and troubling 

 them. 

 {Parallel, ^ Thg greater being . two im . hes long . 



" VThe leaser and most common, called 



Strains ag- j 

 glutiuated:.' 

 and those } species; 

 either 



I strttu'-u-ormg. 



5 <j Or no straws 

 adhering, 

 but small 

 stones, or 

 fine sand ; 

 which are 

 either 



Or transrerse and shorter, with sometimes small 

 tories and shells intermixed, 



with little worms within, called cod-bait, 



With somewhat larger stones adhering 

 to the sides of the case, but never to 

 the fore or back part of it ; whence 

 it necessarily appears flat and com- 

 Or flat and pressed. 



compress- Or with no stones adhering to the 

 ed, either sides ; but with a case extending on 

 each side into a narrow margin, or 

 border, like wings ; and the case is 

 more flat and compressed than the 

 former. 



Or crooked, or rather resembling a horn : for the cases of these are 

 crooked, and one extremity is larger, the other less. Of these I 

 have known four different species, viz. the black, large and small ; 

 and ash colour, large and small. 



All these produce flies with large wings, like those of butterflies. The 

 nympfuB of these (which are to spring from those small worms, and which, 

 like tortoises, carry their houses about with them, within which they turn 

 into nymphte, from which nymp/ue afterwards spring little flies ) Dr 

 Swammerdam refers to his fourth order of transmutations, 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, 

 top-ether with many curious particulars concerning aquatic insects, is to 

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

 Morton, chap. vii. 



