536 
INSECTS. 
ORDER VII—NEUROPTERA. 
With four nuked, transparent, reticulated wings; mouth 
formed for mastication ; jaws and lips straight and extended ; 
joints of the tarsi variable, but generally entire. 
Section I.—Subulicornes. 
With subulate antennae scarcely longer than the head, consist¬ 
ing of seven joints, the last formed of a seta; mandibles and 
jaws covered by lips, or an anterior projection of the head ; eyes 
large and projecting; wings horizontally extended, or perpendi¬ 
cular. 
TRIBE I.-LIBELLULINiE. 
Tarsi three-jointed; mandibles and jaws very strong, and 
corneous ; wings unequal; no internal setae or filaments on the 
abdomen ; sexual organs under the second abdominal annula- 
tion. 
Genus LJBELLULA.— Linnceus. 
Generic Character. —Wings, while in repose, horizontally ex¬ 
tended ; head nearly globular ; antennae short, ending in a joint¬ 
ed seta; eyes contiguous, and very large; the three lip pieces 
joined by a suture, the middle piece being longer than the lateral 
ones; abdomen long, subdepressed, and pointed. 
Libellula quadrimaculata. — The Four-Spotted Dragon-Fly. 
Plate C- fig- 7. 
Head and thorax dark brown ; abdomen yellow, the segments 
next the tail dark umber-brown ; upper margin of the wings 
with two brown spots on each ; tail bifurcate. One inch and 
three-fourths long. Inhabits Britain. 
TRIBE II.-EPHEMERINiE. 
Tarsi four-jointed; body very soft; inferior wings much 
smaller than the superior ones, and in some species nearly im¬ 
perceptible ; abdomen terminating in two or three lengthened 
filaments. 
