NEUROPTERA. 61 
The abdomen is terminated by five appendages, but one of them is 
truncated at the end. 
JE. grandis; Libellula grandis, L.; Rees. Insect: Aquat., VI, 
iv. One of the largest species of this family, being nearly two 
' -inches and a.half in length; fulvous-browns two yellow lines on 
each side of the thorax; abdomen spotted with green or yellow- 
ish; wings iridescent. It darts with amazing. rapidity over 
meadows, and along the shores of rivers, &c.,, pur suing flies 
in the manner ie? the Swallow(1). 
AaGrion, Fab. 
‘Where the wings are elevated perpendicularly when at rest, the 
head is transversal, and the eyes are distant. : 
The form of the labium is analogous to that of the shnz, but 
the intermediate lobe is divided in two, down to its base. The third 
joint of the lateral lobes is in the form of a membranous ligula. 
The antennz seem to be composed of but four joints.. The forehead 
presents no vesicle, and the simple eyes are almost equal, and ar- 
ranged in a triangle on the vertex. The abdomen is very thin or 
even filiform, and sometimes very, long. That of the females has 
_ its posterior extremity furnished with serrated laminz. 
' The body of these Insects,.in their first and. second states, is 
equally slender and elongated, and the abdomen terminated by three 
fin-like lamin. The mask is:flat, the superior extremity of the 
mentonniére being raised into a point in some, and forked or sloped 
in others; the pincers aré narrow, but terminated by several denta- 
tions, and resemble hands. 
‘ A. virgo; Libellula virgo, L.; Res: 2 Tnseak Aghae Sa ix. 
Golden-green or green-blue; superior wings sometimes either 
. entirely blue or only in the middle, and sometimes of a yellow- 
ish-brown. The mentonniére of the larvz and nymph is sloped 
like a lozenge at the extremity, and terminated by two points. 
A. puella; Libellula puella, L.; Rees. [b., x, xi. Very vari- 
ous as to colour; its abdomen is most commonly annulated with 
black, and the wings are colourless. 
The superior extremity of the mentonnicre of the larve and. 
nymphs forms a salient angle(2). 
(1) See the same works. The shna forcipata might form another subgenus. 
(2) For the otherspecies, see Fabricius, Entom. Syst.; Lat., Hist. Gener. des 
Crust. et des Insect., XIII, p. 15; Olivier, Encyc. Méthod., article Libellule, and 
especially the preceding Monographs, where the variety of species and of their 
