APPENDIX. 



No. I. 



Water insects 

 that cover 

 themselves 

 with cases, 

 have a case 

 either. . . . 



, being affixed 

 to stones; and have a 

 body either 



Or no 



adhering 

 butsmaO 



M-.M-* ..r 

 H:M -.ir,.|;' 



which 

 are either 



[Referred to from the end of PART I.] 



A Synopsis of AQUATIC INSECTS covering themselves with cases. 



Round, with little threads 



on the sides; or 

 Flat, and mere compress- 

 ed,without little th reads. 



Or moreabif, portable and migratory, called " phryga- 

 MM," rti/yo, ' a cad-case," which is furnished with 

 little threads, as well on the back as the sides, by 

 His whereof thev adhere (irmly to their cases, ex- 

 cepting only their head and feet; with three small 

 protuberances projecting 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. 

 "Straw* ag- f Parallel, f The greater being two inches 

 .-I u tm. i- f const i tut ^ long, 

 led : and J ing two ^The/*rand most common, 

 those ei-^ species; ( called straw-worms. 

 ther. ... I Or transverse and shorter, with sometimes 

 ^- small stones and shells intermixed. 



ul i little worms within , called cod bait 

 r With somewhat larger stones ad. 

 he ring to the sides of the case, 

 but never to the fore or back 

 part of it : whence it necessarily 

 appears flat and compressed. 



2 J fine sand; ^ - v 0r Wltn no flones adhering to the 



which sides ; but with a case extending 



on each side into a narrow mar- 

 gin or border, like wings; and 

 the case is more flat and cotn- 

 L L pressed 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 nymph* of these (which are to spring from those small worms, 

 and which like torsoises carry their houses about with them, within 

 which they turn into nympha, from which nymphee 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 in- 

 serted, together with many curious particulars concerning Aquatic 

 Insects, is to be found in the KaturoJ History of Northamptonshire, 

 by the Rev. John Morton, chap. 7. 



Or/al 



either 



