Three forms of this species occur with us. In that represented on Plate 128, Fig. 4, the fore wings are almost entirely {259} blackish. Another has a larger portion of the inner marginal area ochreous brown, or whitish, ab. _melaleuca_, Vieweg; a third form, and the least frequent, may be described as pale ochreous brown with darker mottling on the basal half, and black central markings representing a broken streak from the base of the wing to the outer margin, in this form the pale outlined stigmata are fairly distinct, and there is a blackish shade between them extending from the front to the inner margin. From chrysalids obtained by digging under oak and elm trees in a private park several miles from Taunton, Somerset, Mr. H. Doidge (1901) reared moths and obtained eggs which were laid in a batch on the covering of the cage in which the female was placed with a growing plant of bird's-foot trefoil. The eggs hatched on May 31, ten days after they were laid. The young caterpillars were purplish grey, but after feeding on the yellow flowers they assumed the same colour. "After finishing the flowers they commenced on the leaves, by which time they were a pale green colour, with a yellow spiracular stripe, and were fond of resting by day on the stems of the plant. As they approached the final stage, the green became shaded with brown and black," and then resembled the ripening seed pods. They were afterwards supplied with blackthorn, and did not object to the change of food. They also ate dock (sparingly), and _Trifolium minus_. "About July 8 they began to go under ground to pupate. The pupæ, which were of a dark reddish-brown colour, and somewhat obese and blunt, being enclosed in a very compact and brittle earthy cocoon" (Doidge). The moth is out in April and May, but is very local in England. It has occasionally been found at rest on isolated tree trunks or on posts, but very rarely captured in any other way. Specimens have been obtained from chrysalids dug up now and then from about the roots of trees, but perhaps most of the specimens in collections, not numerous altogether, have been reared from eggs. In England the species is only known {260} to occur in Kent, Surrey, Suffolk, Gloucester, Somersetshire, Worcestershire, and Herefordshire. Barrett also mentions one specimen at Gower, South Wales. THE BEAUTIFUL ARCHES (_Eumichtis_ (_Hadena_) _satura_).