54 
The perfect insect appears in May. 
The caterpillar is blackish grey; the back greenish grey, 
white on the sides, a row of yellow spots and a double 
yellow line, and a black raised spot on the fifth and twelfth 
segments. 
The date of the appearance of the caterpillar is in Sep¬ 
tember. 
It feeds on the sallow. 
NOTODONTIM3. 
GLUPHISIA CRENATA. 
Plate XXXVIII. Figure 2. 
Localities for this very rare species are Ongar Park 
Wood, Halton in Buckinghamshire, and at Epping. 
The situations where it is found are woods. 
The perfect insect appears in May and June. 
The caterpillar is pale green, with a line along the back, 
spotted with rust colour, and bordered on each side 
by a yellow line. 
The date of the appearance of the caterpillar is in August. 
It feeds on the poplar. 
PTILOPHORA PLUMIGERA. 
Plate XXXVIII. Figure 3. 
Localities for this species are Darenth Wood, Birch 
Wood,Chatham, Henley-on-Thames,Marlow,and Halton. 
The situations where it is found are woods. 
The caterpillar is pale green, with a line of bluish green 
