Mr. W. H. Flint records (1902) the species from the Forest of Dean district, where, he states, he could easily have captured two dozen a day, as they flew over trefoils, etc. The species occurs in most of the southern seaboard counties of England, from Kent to Cornwall and including the Isle of Wight; Surrey, Bucks., Essex, and other eastern counties, including Cambridge; and it has been recorded from Yorkshire. On the western side of the country it is found in Somerset, Gloucester, Hereford, Worcester, Staffordshire, and in South Wales. {359} THRIFT CLEARWING (_Sesia muscaeformis_). This is our smallest species of the genus, and it is further distinguished by narrow clear spaces on the blackish, or bronzy, fore wings, three whitish bands on the body, and traces of a whitish line along the middle of the back. (Plate 155, Fig. 7.) The caterpillar feeds on the roots of thrift or sea-pink (_Armeria vulgaris_), and is full grown about June. The moth is out in June and July, and seems to have a liking for the flowers of thyme. This species (also known as _philanthiformis_, Laspeyres) frequents rocky places on the coasts of Devon (Torquay, Lynmouth, etc.), Cornwall, Wales; Isle of Man; Scotland (Aberdeenshire); and Ireland (Saltee Islands, Wexford, and Seven Heads, Cork. Gregson recorded it from Howth). FIERY CLEARWING (_Sesia chrysidiformis_). The orange red colour on the fore wings, and of the tail tuft, at once distinguish this species (Plate 155, Figs. 8 [male], 9 [female]) from either of its British allies. The blackish body has two pale-yellow belts, but in the male the lower one is often double. As a rule, the body of the female is stouter than that of the male, but the bodies of some males appear quite as thick as those of the females, and the true sex is only disclosed by the ciliated antennae, which is a character of the male alone. The caterpillar feeds on the roots of dock and sorrel, and it is full grown about May. In June and July the moth is on the wing and flies in the sunshine, about noon, over the food plants. The species occurs not uncommonly in the Warren at Folkestone, Kent. This locality, well known to entomologists, is a long stretch of rough broken ground lying between the railway {360} and the sea; and is probably the only spot in the British Isles where the Fiery Clearwing is almost certain to be found, either in its early or its perfect stage, at the proper season. The moth has been recorded from Eastbourne, Sussex (1874), and from the Forest of Dean, Gloucestershire (1902). HEPIALIDAE. Of the twenty-two Palaearctic species belonging to this family, nine appear to occur in Europe, and the range of five of these extends to the British Isles.