The Hijlory of ANIMALS. 73 
and tranfparent, but of a whitifh hue: the tubercles above the eyes are very large, and 
of a deep bluirii-black : there are two hairs at the tail, which are equal to the body in 
length. 
It is frequent about waters in June. , s 
The other fpecies of the Ephemera are, I. The clouded and fpotted-winged Ephe¬ 
mera, with three hairs at the tail. 2. The thicker-booied Ephemera, with two 
hairs’at the tail. 3. The white-winged Ephemera, with a black verge, and with 
two hairs at the tail. 4. The black Ephemera, with the wings white underneath. 
LIBELLULA. 
\ , r i. 1 4 v J ~ jSt » - <■ • * * - - - 
r-jjp H E mouth of the Libellula is furniriied with jaws: the antennae are fliort, 
and the tail is terminated by a kind of forceps. 
The fpecies of this genus are conliderably numerous; and as they differ confiderably 
in fize, and in the pofitions of their wings, while fitting, they may be conveniently 
divided into three fets: the firft confiding of thofe which are of a middle fize, and 
which carry their wings eredt as they fit; the fecond comprehending the fmall ones, 
which fit with their wings ered; and the third the larged, which fit with their 
winp;s plane. Of each of thefe divifions we fhall defcribe one, and after this the red 
will tie eafily didinguidied by their names. 
Libellula corpore viridi-cceruleo y alts fubfufcis , punElo marginali albo . 
The bluifo-green-bo died Libellula , with hr ownijh wings y with a white 
fpot at the edge . 
This is a very elegant and beautiful Infed: the body is near an inch in length, and 
of a beautiful green, with a cad of blue in fome lights: the head is large ; the eyes are 
remarkably large and prominent; the legs flender arid black ; the wings have a faint 
tinge of a yellowifh brown, and have each an oblong, white fpot near the edge. 
It is frequent with us about waters; the male of this fpecies has a blue body, and 
even the wings bluifh. 
Libellula corpore incarnato , alis punclo marginali fufco. 
The Libellula , with a red body , and a brown fpot on the edge of each 
wing , 
This is one of the fmaller dies of this genus; it’s body is nearly as long, indeed, as 
that of the former, but it is denderer, and is of a bright red colour; the head is 
large; the eyes are very large and prominent; the legs are dender : there are fome 
black lines near the fegments of the belly; the wings are pellucid and brownifh, and 
have each a deep brown fpot near the edge. 
It is frequent with us about rifh-ponds. 
Libelhda alis 7 nacula duplici marginali. 
The Libellula y with a double marginal fpot on the wingy. 
This is one of the larged of the Libellulae : it’s body is near an inch and an half in 
length, and is confiderably thick; it is larged at the two extremities, and fomewhat 
fmaller in the middle: the thorax is thick, of a greyifh colour, and hairy on the up¬ 
per furface : the wings are yellowifh toward the bafe, and whitidi elfewhere; they 
have each two fpots, one below the other, of a deep dufky brown 3 the body is of a 
fhining green, and is fomewhat hairy at the rides: the tail is furnished writh two ap¬ 
pendages, each fmaller at the end than in the middle. 
It is frequent with us about rivers. 
The other fpecies of the Libellulae of the fird divirion are, 1. The fmooth, bluifh- 
green-bodied Libellula, with yellowifh, brown wings, with no fpots at the rides. 
2. The blue-bodied Libellula, with bluifh-green wings, brown at the extremities, but 
not fpotted. 3. The blue-green, riiky-bodied Libellula, with brownifh-yellow 
wings, with a black fpot on each. 4. The greyilh-bodied Libellula, with dulky 
brown wings, with a black fpot on each. 
U 
Of 
