242 
SYSTEMATIC ARRANGEMENT. 
Europe possess very few ; in the last mentioned con- 
tinent, indeed, only two species occur, and they are 
of comparatively small size, namely. Bacillus Rossius, 
and B. G alliens, natives of Italy and the southern 
provinces of France. 
One of the species is said to have been occasionally 
used as an article of food, and is hence named 
P. edule. The late Rev. Lansdown Guilding has 
made us acquainted with the singular fact, that if 
the larva or nymph of P. cor nut um, happen to lose 
one of its legs, it reappears after the first change of 
skin following the accident, although it is always 
smaller than the opposite limb of the same pair. 
PHASMA NECYDALOIDES. 
Plate XI. 
Lat. Gen. Crust et Insect, tom. iii. p. 87. — Fair. Stoll , PI. III. 
fig. 8; and PI. IY. fig. 11. 
This conspicuous insect affords a good example of 
the genus Phasma, as it has been restricted by Ser- 
ville and St. Fargeau. According to these authors 
it is characterized by having the first joint of the 
antennae cylindro-conic ; the second globular ; three 
large ocelli; the body cylindric, always provided 
with wings and tegmina (in both sexes) ; the thighs 
and tibiae linear and simple. The general colour of 
P. necydaloides is greyish-yellow ; eyes red ; thorax 
with pointed tubercles ; abdomen and posterior legs 
cinereous; the incisures and articulations brown. 
Tegmina small, pale brownish-yellow, with dark- 
brown nervures; exterior edge of the wings light- 
