This species was first noted as British in March, 1860, when specimens from Worcestershire were recorded as _Procris tenuicornis_. It seems, however, to have been considered doubtfully distinct from _statices_ until 1863, when the caterpillar was found, and the occurrence of the species in several other English counties recorded. At the present time _I. geryon_ is known to inhabit Sussex (Brighton and Lewes districts), Kent (Canterbury and Shorncliffe), Bucks (Aylesbury and Tring), Oxfordshire (Chinor), Gloucestershire (Cotswolds), Worcestershire (Malvern Hills), Derbyshire and North Staffordshire (Bakewell and Dovedale), Yorkshire (Richmond, Barnsley, Sheffield, etc.), and Durham (banks on the coast). In Wales, it is sometimes common on Great Orme's Head, Carnarvonshire. COCHLIDIDAE. This family of moths mainly comprises tropical species, and is but poorly represented in the Palaearctic Region. Only two species are European, and both occur in Britain. As _Cochlidion_, Hubner, supersedes _Limacodes_, Latrielle, the name of the family so long known as Limacodidae, will have to {345} be changed to that here adopted. Meyrick, who sinks _Limacodes_ in favour of _Apoda_, Haworth, uses Heterogeneidae as the family name. THE FESTOON (_Cochlidion_ (_Heterogenea_) _limacodes_). The fore wings of the male are orange brown, more or less smudged or clouded with blackish; two oblique black lines, the first inclined inwards, and the second outwards and apparently terminating on the outer margin just above the inner angle, but there is a slender dusky curve from this point enclosing a clear, orange-brown spot. Hind wings blackish, except on the inner margin, which is broadly orange brown. Female, ochreous brown, with lines on the fore wings as in the male; hind wings suffused with dark grey or blackish, except on the inner area; generally rather larger than the male. (Plate 153, Figs. 1 [male], 2 [female].) Not infrequently, the fore wings of the male are so much clouded with blackish that the cross lines are obscured, and the spot on the inner margin alone remains clear. The caterpillar (Plate 149, Fig. 1, from a coloured drawing by Mr. A. Sich) is green, with two reddish-edged yellow lines on the back; between these lines are yellowish spots; a yellow line along the sides extends along the front edge of the second ring, where it is marked with red. It feeds on oak, and may be beaten from the boughs in the autumn. The brownish cocoon is depicted on Plate 149; Fig. 1a shows the hinged lid which covered the opening through which the chrysalis protruded previous to the moth's escape; Fig. 1b represents one from which the moth has not emerged, and in nature this would be attached to a leaf and covered with a delicate film of silk. The moth is out in June and July, and both sexes may be beaten from the branches of trees, or seen flying around their tops in the sunshine. {346}