OF INSECTS. 
293 
tlie posterior ones; legs black. A native of the 
country round New York. 
iESHNA GRANDIS. 
Plate XXVIII. Fig. 1. 
Lib. Grandis, Linn. Fair. Donovan's Brit. Ins. X. 30, PI. 337, 
fig. 2. Harris Expos. PI. 12, figs. 1, 2. Roesel Insects , IV. 
This genus includes the largest four native dragon- 
flies. The horizontal position of the wings, when at 
rest, distinguishes it from Agrion , to which it is in 
many respects very closely related, and the long 
narrow abdomen, which never approaches to the 
diameter of the thorax, is the most obvious distinction 
from Libellula. The two posterior ocelli are placed 
on a transverse ridge, and the central lobe of the 
labium is rather large, while the two lateral ones 
are divergent, armed with a strong tooth, and having 
a spinous appendage attached to them. The larva 
and nymph are more elongated than in Libellula, 
and the structure of the mask is somewhat different. 
About half a dozen species occur in Britain. JE. 
grandis is two inches and a half in length, of a ful- 
vous brown colour, with tw f o yellow' stripes on each 
side of the thorax, the abdomen variegated with 
green or yellow. It is of occasional occurrence on 
moors, marshes, &c. throughout the country. 
NEMOPTERA ANGULATA, West. 
Plate XXVII. Fig. 3. 
Westivood ; Trans. Ent. Soc. Vol. l,p. 75. 
Of the family Panorpidie, which contains but few 
