This is another exceedingly variable species. The ground colour of the fore wings ranges from pale whitish or ochreous brown, through various tints of greyish and red brown, up to black or sooty brown; variation in markings is somewhat similar to that referred to in _A. cursoria_. Three forms are shown on Plate 106, Figs. 7, 8, and 11; the latter represents a specimen closely approaching _A. obelisca_. Var. _aquilina_ (Figs. 9 and 10), the English name of which is the Streaked Dart, is larger than the type, and the wings, consequently, are broader; by some entomologists it is considered to be a distinct species. The caterpillar is obscure greyish or brownish, with a dark-edged pale line along the middle of the back, and a dusky line {208} on each side of it; low down on the sides is another dusky line. It feeds from September to May on mouse-ear chickweed, bedstraw, plantain, and other low-growing plants growing on sandy soils. The moth is out in July and August, and is widely distributed throughout the British Isles, including the Orkneys and Shetlands, but especially common on coast sandhills. THE SQUARE-SPOT DART (_Agrotis_ (_Euxoa_) _obelisca_). The fore wings of this moth (Plate 106, Fig. 12) are pale greyish brown, purplish brown, or sometimes slaty brown, with fairly distinct black cross lines, and a pale streak along the front edge; the first line is straight and less angled, and the second line less curved towards the front margin than in _A. tritici_. The caterpillar, which feeds from about October to July on rock rose, bedstraw, and other low plants growing in rocky places by the sea or on hillsides, is very similar to that of the last species. The moth is out in August and September in its special haunts. A well-known locality for it is Freshwater in the Isle of Wight, but it may be obtained at Torquay, Devonshire; Padstow, Cornwall; and the Scilly Isles. Also recorded from Sussex, Gloucestershire, Herefordshire, South Wales, Derbyshire, Cheshire, Lancashire, and Yorkshire. In Scotland on the south-west and east coasts; and in Ireland at Howth, Dublin; Dungarvan, Co. Waterford; and Mt. Charles, Donegal. THE HEART AND DART (_Agrotis_ (_Feltia_) _exclamationis_).