210 



The caterpillar is dull green, with, a row of triangular- 

 shaped reddish spots, edged with white along the back. 



The date of the appearance of the caterpillar is in May. 



It feeds on the white meadow saxifrage (Saxifraga 

 granulataj, and the mossy saxifrage (Saxifraga hyp- 

 noides). 



LARENTIA SALICARIA. 

 NORTHERN TWIN-SPOT. 

 Plate XXVIII. Figure 10. 



THIS insect measures a little over an inch to nearly 

 one and a quarter in expanse. 



Male: fore wings rather dark brownish-grey, crossed 

 by several dark grey lines. The first line is darker and 

 waved; second line dark grey, edged indistinctly with 

 whitish, central shade dark grey, with a pale blot near 

 the upper margin; third line whitish, central spot black. 

 Hind wings brownish-grey within the outer margin. 



Localities for this species are York, Huddersfield, 

 Ambleside, Manchester, Arran, Newcastle-on-Tyne, Isle 

 of Man, Waterford, Darlington, Ben Nevis, Ben Donish, 

 Storeton near Birkenhead. 



The perfect insect appears in June. 



LARENTIA OLIVARIA. 

 BEECH-GREEN CARPET. 

 Plate XXVIII. Figure 11. 



THIS insect measures from an inch to an inch and a 

 quarter across. 



