SWALLOW-TAIL BUTTERFLY. 
95 
a series of imperfectly defined blue spots, and a row 
of six large yellow crescents externally ; the outer 
edge is also yellow, interrupted with black at the 
nervures. On the hinder angle of each of the un- 
der wings there is a large round spot of red, streaked 
with light blue anteriorly, and nearly surrounded by 
a black ring. The under side resembles the upper, 
the most considerable differences being in the yellow 
outer border of the upper wings, and the presence of 
two or three faint red spots behind the discoidal cell, 
and another on the outer edge of the under wings. 
The body is black above, and clothed with yellow 
hairs, the latter forming a line on each side of the 
thorax ; the under parts are chiefly yellow. 
The caterpillar is not of large size compared with 
the perfect insect. It is smooth, of a greenish co- 
lour, with the incisures and a band on each seg- 
ment deep black, spotted with red ; the retractile 
organ on the neck of the latter colour.* (Plate III. 
fig. 1.) It is a solitary feeder, and usually fre- 
quents umbelliferous plants, preferring fennel, and 
the wild carrot. It also feeds on the latter plant in 
a cultivated state, and sometimes occasions consi- 
derable injury to it in France, where the insect is 
very common, and hence known in certain districts 
by the name of Grand Carotlier. The chrysalis is 
green, with a streak of yellow along each side, and 
an irregular row of yellow spots on the back. 
* For an accurate and more detailed description, re- 
ference may be made to Ray’s Hist. Insect, p. 111. 1. 
