Tt 
g Introductory View of the 
forcing open a small circular lid at one end of the cocoon (A). 
The insects, as soon as they came forth, were active and ready 
for flight. 
It is of diminutive size, the 
females not exceeding two lines 
in length, the males some- 
thing less; the antennee fili- 
form, longer than the body, 
black; the legs rufous, some  «¢ 
have the thighs of the hinder ; 
pair marked with a black spot; 
the head, thorax, and body, of 
a deep black, except in the 
females, which are marked 
with white on the anterior part 
of the abdomen beneath; the 
abdomen is ovate and subses- 
sile; the wings are a little 
longer than the body, rounded 
at their ends, and the anterior 
pair marked on their exterior 
margin, near the posterior 
angle, with a black spot. Eatgoor the natural sige | oagnifed. 
I send for your examination _ ¢, Pertect insect natural size ; f, magnified. 
p + g, Cocoon natural size ; 2, magnified. 
some of the parcels of cocoons, 
and many of the insects; and [ hope you will indulge your 
readers with a magnified figure of this interesting little: British 
insect, and of the cocoons in their collective form, as well 
as in magnified detail. (fg. 9.) Pai, Su, ccc. 
Clapham, July 18. 1829. ‘Dakh. 
Art. XIII. An Introductory View of the Linnean System of Plants. 
By Miss Kent, Authoress of Flora Doméstica, Sylvan Sketches, 
&e. 
(Continued from Vol. IL. p. 164.) 
Berore I proceed to speak of the beautiful class Hexdn- 
dria, it may be well to say a few words of the different species 
of calyx. Linnaeus enumerated seven; of which, by far the 
most common is the perdanth, which grows immediately be- 
neath the flower; the other six are the spatha (a slice, Gr.) 
involucrum (a wrapper, Lat.), amentum (a bond, Gr.), gluma 
(a husk, Lat.), volva (volvere, to wrap, Lat.), and calyptra 
(a cover, Gr.). The volva and calyptra belong exclusively to 
plants of the twenty-fourth class, of which we shall speak in 
