DRAGON-FLY. 
247 
rally of a bright and beautiful sky-blue, varie- 
gated with black bars on the joints, and with the 
thorax marked by black longitudinal stripes: the 
wings are transparent, and each marked near the 
tip with a small oblong-square black marginal 
spot: the head in this species, as well as in the 
L: Virgo, is broader and narrower in proportion 
than that of the L: varia, and the eyes are round, 
protuberant, and placed on each side at a distance 
from each other, instead of coalescing at the upper 
part as in the L: varia: this species oft(^n varies; 
being red or brown instead of blue. Its larva re- 
sembles that of the L: Virgo in shape, but is pro- 
portionally smaller, and, like that, is also furnished 
with three large, lengthened-oval, leaf-shaped ap- 
pendages. 
The exotic Libellulae are very numerous: among 
the most remarkable mav be numbered the L: 
Lucretia, figured in the elegant entomological 
work of Mr. Drury. It is a native of the Cape of 
Good Hope, and is distinguished by the excessive 
length of its slender body, which measures not 
less than five inches and a half in length, though 
scarcely exceeding the tenth of an inch in di- 
ameter: the wings are transparent, of a slender or 
narrow shape, as in the L: Puella, to which this 
species is allied in form, and measures five inches 
and a half in extent from tip to tip : the colour of 
the head and thorax is brown, with a yellowish 
stripe on each side, and the body is of a deep 
mazarine blue. 
I should not dismiss the genus Libellula with- 
