133 



The perfect inject 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 

 f Vicia Cracca,J &c. 



rsonos TREI'IDAUIA. 



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 line also brownish-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 

 July. 



