SCOTCH OR MOUNTAIN BURNET. 335 



Scotch or Mountain Burnet {Zygcena exulans). 



This semi-transparent and rather greyish moth has five 

 reddish spots on the fore wings. (Plate 146, Fig. 3.) So far 

 as concerns the British Isles it is only known to occur in 

 Aberdeenshire, where it was discovered on the mountains at 

 Braemar in July, 187 1, and where it may be still found by those 

 who are acquainted with the situation of its lofty haunts. The 

 late Dr. Buchanan White named the Scottish form subochracea, 

 but others consider that it is not readily separable from 

 vanadis, Dalman, which in turn is said by Tutt to be pretty 

 much the same form of the species as that described as the 

 type exulans^ Hochenwarth. 



The caterpillar is dark green above, and paler below ; two 

 velvety black stripes on the back, each stripe interrupted by 

 yellow spots ; warts with black hairs ; head, black. It feeds on 

 Silene acaulis^ cyphel {Arenaria cherleria = Cherleria sedoides)^ 

 clover, trefoils, Azalea procufjtbens, etc. ; has been known to 

 eat dock and knot-grass : August to June. The cocoon has 

 been found on a stem of crowberry {Ernpetrum), and on heath 

 and grass stems. The moth is out in July, and, like the rest of 

 its kindred, delights in the sunshine. 



Zygcena achilkcB. 



A specimen of this species, quite recently introduced as 

 British, has been kindly lent by Mr. B. Adkin. It was taken, 

 with others, in the vicinity of Oban, Argyllshire. Mr. Sheldon 

 informs me that he believes that a worn Zygaenid he captured in 

 1898, in the Glencoe district, was this species. 



On Plate i, with the Scottish example (Fig. 2) referred to, 

 is also shown a specimen from the continent (Fig. 3), and it 

 will be noted that the former is very like the latter. In some 



