64 PL ATS Tax. 
forth; it hath a long body like the Fly, fix Legs, and a forked Head, a 
fharp {pine at the extremity of the abdomen, and a row of fpines on 
each fide, one at every joint; it plunges into the water, and imme- 
diately devours fuch of the inhabitants, or their eggs, as comes within 
its reach, and it continues this life of depredation until its next 
change. They are to be taken with a {mall hand-net. | 
All tranfparent objects, in a certain direGtion before a microfcope, 
refle&t the colours of the prifm. The Tipula Plumofa exhibits, in 
this fituation, an effulgence of colouring, which its natural fize con- 
veys but fmall veftiges of; and the colours on the wing of this Libellula 
appears far more vivid when magnified. 
The body of the male is bluith grey; the prefent {pecimen is the 
female. 5 
PLATE 
