453 
times to look for some more of them, but never having an 
Oportunity to go thither at or near the same time of the Year 
until now (May 21, 1749), I never could find any, this gave me 
reason to think they changed into some other shape, or altered the 
place of their abode in the different seasons of the year, the former 
of which I now plainly see is the case. 
“ The Regularity and Strangeness of the Shape of these Insects, 
with the various Forms they can and do at pleasure put on, would 
render any description I own incredible to any persons excepting 
to those who have taken pains to survey and admire the wonderful 
contrivances, beauty, and symmetry, there is to be observed in 
every other species of the insect tribe. 
“ In my above mentioned letter, if 1 mistake not, I gave you the 
drawings of two different Forms this insect changes into, but I 
now see it can at pleasure put on a third such as you see pictured 
at Fig. & it is further to be noted of these different shapes that 
it remains often but a very small time, at others longer, just as I 
presume the necessity of affairs require. 
“The first form 1 had the pleasure to see this Insect, was when it 
spread its Nets to catch its prey, (see Baker’s Microscope made 
Easy, Plate xiv, f. viii, to which I shall refer for the delineation 
of this form). The second when it puts forth its little spears 
(fig ix) ; the third which I have since observed, is represented at 
(fig. x) in which it mostly lies when it is watching for a capture, as 
I have more than once observed. 
“On the 21 of this instant, May, happening to be near the above 
mentioned Cascades, & remembering it was nigh the time I had 
formerly found these insects, it cost me but very little trouble to 
light upon them again, and even in the very place where I had 
found them before. A great many of them I brought home in a 
phial, but in two days the greatest part of them were dead, and 
the others had spun themselves Cases in the manner you will find 
them pictured at (fig. xi, xii). It is somewhat remarkable, altlio’ I 
had changed the water I kept the insects in 3 or 4 times in 
48 hours, yet it stunk every time to such a degree as is scarcely 
credible, especially when I tell you the whole quantity of insects 
bore no greater proportion to the including water than 1 to 
1,550,000. How exquisitely minute must the particles of this 
effluvia be.” 
l l 2 
