133 
The perfect insect appears in July and August. 
The caterpillar is bluish-grey, with a slanted dark grey 
streak on each segment. 
The date of the appearance of the caterpillar is in May (?). 
It feeds on the broom {Genista tinctoria), the vetch 
( Vida Cracca ), &c. 
PSODOS TREPIDARIA. 
BLACK MOUNTAIN MOTH. 
Plate XXI. Figure 7. 
This insect measures from a little under an inch to 
about an inch in width. 
Male : fore wings dark blackish-grey glossed with dull 
bronze, the first line brownish-black and jagged; the 
second linealsobrownish-black waved and much narrowed 
inwards towards the base of the former ; central shade 
darker than the remainder ; central spot black and placed 
near the upper margin, the outer margin bordered with 
a thin black line. Hind wings blackish-grey, with indi¬ 
cations of spots and two cross darker lines, and a slender 
line of black round the outer margin, bordered again 
with a pale edge. 
Localities for this species are at and about Rannoch. 
The situations where it is found are the highest parts 
of mountains. 
The perfect insect appears at the end of June and in 
J uly. 
