2 Pl. 17. 1, 2. BEAUTIFUL YELLOW UNDERWING. 3, 4. SMALL YELLOW UNDERWING. 5, 6. BROAD-BORDERED WHITE UNDERWING. 7. SMALL DARK YELLOW UNDERWING. 8, 9. THE PEASE BLOSSOM. 10, 11. BORDERED SALLOW. {45} The caterpillar is reddish brown, with three white lines along the back, and a reddish-freckled ochreous stripe low down on the sides. Sometimes the general colour is blackish. It feeds on bearberry (_Arctostaphylos_) in June and July; also said to eat _Vaccinium uliginosum_; in confinement it will thrive on _Arbutus unedo_, commonly known as the "strawberry tree." The moth is out in May, when it flies in the sunshine, and in dull weather sits about on the rocks, stones, lichen, etc. Mr. Cockayne notes that at Rannoch he met with it from May 17 in numbers, but always in isolated spots where bearberry was plentiful. Here the moths were either feeding on the flowers or settled on the ground. He further remarks that this species occurs at the comparatively low elevation of 800 to 900 feet, whereas the next species ascends to 2000 feet. The distribution abroad extends to Amurland and Labrador. THE BROAD-BORDERED WHITE UNDERWING (_Anarta melanopa_). This species has the ground colour of the fore wings greyish in the type and brownish in var. _wistromi_, Lampa. Specimens with the fore wings more or less typical, but with the normally white area of hind wings dark greyish, are referable to ab. _rupestralis._ I remember seeing a specimen of the last-named form in the collection of the late Mr. S. Stevens, but I believe that it is very rare in the British Isles. In all forms there is variation in the stigmata, and in the orbicular especially. (Plate 17, Figs. 5 [male] and 6 [female].) {46} The caterpillar is of a purplish pink colour, with a black-edged ochreous-brown line along the middle of the back, broken up by reddish-brown triangles; the stripe along the region of the black spiracles is yellowish white flecked with red; the sides of the body above the stripe are flecked with reddish, and above them is a yellowish-white line and some black marks. Head, brownish, freckled with darker. It feeds at night, in July, on bilberry (_Vaccinium myrtillus_), cowberry (_V. vitis-idaea_), and can also be reared on strawberry tree, sallow, knotgrass, etc. In the daytime it must be searched for under the leaves. The moth is out in May and the early part of June, and is most active in the sunshine, but flies on dull days when the weather is warm. It seems confined to the higher level of the mountains, and its habits are similar to those of the last species, but its range extends to the Shetland Isles. The species was not recognised as British until about 1830, and the same remark applies to _A. cordigera._ THE SMALL YELLOW UNDERWING (_Heliaca tenebrata_).