The moth, shown on Plate 107, varies in colour and in marking. Fig. 2 depicts a specimen from Perthshire, and Fig. 3 one from North Devonshire. In Southern England the general tint is pinkish brown, and in the north and in Scotland it is dark reddish brown or blackish. A pale greyish form from Ireland has been named var. _hebridicola_, Staud. Sometimes specimens are distinctly rosy in tint, and these are referable to var. _rosea_, Tutt. The caterpillar (Plate 109, Fig. 2) is reddish brown, or green, with whitish lines on the back, the central one edged on each sides with blackish, and the others inwardly marked with black; a yellowish stripe low down along the sides, sometimes marked with reddish; usual dots black; spiracles white, dark ringed; head greenish yellow marked with darker in the green form, and yellowish brown marked with darker in the brown form. It feeds from September to June on heath and heather. The above brief description was made from apparently full-grown caterpillars received from the New Forest on May 28, 1907, but not one of them attained the chrysalis stage. The moth is out in August and September, and occurs on most of the larger heaths, and on moorlands throughout the British Isles, including the Hebrides and Orkneys. [Illustration] Pl. 110. 1. ASHWORTH'S RUSTIC. 2, 3. NEGLECTED RUSTIC. 4. AUTUMNAL RUSTIC. 5. PLAIN CLAY. 6. DOUBLE DART. 7. FLAME SHOULDER. 8. SETACEOUS HEBREW CHARACTER. 9. TRIPLE-SPOTTED CLAY. [Illustration] Pl. 111. 1. FLAME SHOULDER: _caterpillar_. 2. TRIPLE-SPOTTED CLAY: _caterpillar_. 3. DOUBLE DART: _caterpillar_. {215} THE STOUT DART (_Agrotis ravida_ (_obscura_)). The somewhat dingy brown, or greyish brown moth (Plate 107, Figs. 5 [male], 6 [female]) is sometimes tinged with reddish, and this tint is generally present on the front or costal area. The caterpillar is ochreous brown with a paler line along the back, and a series of dark edged, oblique and more or less curved, yellowish marks on each side; head greyish freckled with brownish; plate on first ring brown marked with pale lines. It feeds on low-growing plants such as dock, dandelion, chickweed, etc.; September to May. The moth flies in July and August, but its occurrence in Britain is somewhat irregular. It is found, sometimes commonly, in most of the southern and eastern counties of England, and also in Durham; and has been occasionally recorded from other parts of the country, as well as from Scotland. For several years it may seem to quite disappear and then suddenly become common in various districts. Its range abroad extends to Amurland, North China, Corea, and Japan. THE NORTHERN DART (_Agrotis_ (_Episilia_) _hyperborea_).