250 
SWALLO-VV-TAIL MOTH. 
two inclies and a half. Tlie colour is delicate sul- 
phur-yellow, shaded at the hase of the wings into 
satiny-white, and deepening towards the hinder 
extremity ; the surface marked with numerous dark 
evanescent streaks, placed transversely ; two lines 
of deep yellow run across the anterior wings, and a 
single one across the under pair, the latter forming 
a continuation, when the vi'ings are expanded, of 
the innermost of the two anterior lines. -4.t the 
hase of the tail there are two small blackish spots, 
the larger one with a reddish centre, and the fringe 
is ochrey-yellow, inclining in some places to reddish- 
bro'wn. 
The colour of the caterpillar is reddish-brown, 
■with darker lon^tudinal lines ; the head flat and 
oval. It feeds on the leaves of various shrubs and 
trees, but prefers the elder, uillow, and lime. It 
changes to a long narrow pupa of a bro'wn colour, 
•with darker spots and streaks, which is inclosed in 
a thin spinning among leaves. The moth appears 
on the wing in June and July, and is not scarce in 
many parts of England, especially in the south ; but 
it appears to be somewhat rare in Scotland. 
