156 
The caterpillar is pale brown, with darker slanting 
streaks on the fifth, sixth, seventh, eighth, ninth, tenth, 
and eleventh segments. 
The date of the appearance of the caterpillar is in May. 
The chrysalis occurs under the ground. 
AC1DALIA BISETARIA. 
SMALL FAN-FOOT WAVE. 
Plate XXIII. Figure 10. 
This insect measures from about three quarters of an 
inch to not quite an inch in expanse. 
Male: fore wings pale yellowisli-grey, dusted with grey. 
The first line is indistinct; second line blackish and 
waved, bordered by a conspicuous grey band; central line 
indistinct; central spot black. Hind wings also pale yel¬ 
lowish-grey, with a dusty line across near the inner 
corner; a dusky band some way within the outer margin, 
within which is another of the same; central spot black; 
the outer margin with a row of brown dots. 
Localities for this species, which is plentifully dis¬ 
tributed throughout the country, are Poynings, Barn¬ 
staple, West Looe, Worcester, Isle of Man. 
The perfect insect appears in June and July (?). 
The caterpillar is greyish-brown, with angular marks 
of darker brown along the back, and slanting stripes of 
the same on the sides. 
The date of the appearance of the caterpillar is in 
August and April. 
It feeds on the dandelion (Leontodon taraxicum). 
The chrysalis occurs below the ground. 
