Later in the summer the Ghost Swift appeared about twilight, the white colour of the male making it very conspicuous. Twilight at Aldington is called "owl light," and moths of all kinds are "bob-owlets," from their uneven flight when trying to evade the owls in pursuit. We often see these birds "hawking" at nightfall in my meadows round the edge of the Forest after moths. The martagon lily flourished in the Aldington garden, and when they were blooming the overpowering scent was particularly attractive to moths of the _Plusia_ genus, including the Burnished Brass, the Golden Y, and the Beautiful Golden Y, all exhibiting very distinctive markings of burnished gold; and other _Noctuæ_ in great variety. The latter are best taken by "sugaring"--painting patches of mixed beer and sugar on a series of tree trunks, and making several rounds at twilight with a lantern and a cyanide bottle. We had a sugaring range of about seventy pollard withies by the brook side, and being well sheltered, it was such a favourite place for moths, that it was often difficult to select from each patch, swarming with sixty or seventy specimens, those really worth taking. At sugaring moths are found in a locality where they are never seen at other times, and rarities occur quite unexpectedly. I took some specimens of _Cymatophora ocularis_ (figure of 80). Newman says: "It is always esteemed a rarity," and mentions Worcester as a locality. _Mamestra abjecta_ was quite a common catch, of which Newman writes: "It seems to be very local, and so imperfectly known that the recorded habitats must be received with great doubt; it is certainly abundant on the banks of the Thames, near Gravesend, and also on the Irish coast, near Waterford." The marks of sugaring remain on tree trunks for many years. I lately saw the faint remains on about sixty trees in Set Thorns plantation, in the Forest, which a friend and I painted on nearly forty years ago. This friend was fortunate in capturing the black variety of the White Admiral, in which the white markings are entirely absent on the upper side; and, thirty years later, his son took another near Burley. The son also caught a Camberwell Beauty on one of his sugared patches in the day-time. I believe this to be the only recorded instance of the occurrence of this rare and beautiful insect in the Forest. The Hornet Clearwing (_Sesia Apiformis_) is a very interesting moth, and it was common at Aldington; the larva feeds on the wood of the black poplar. The colouring of the moth so resembles the hornet, that at first sight it is easily mistaken for the latter. It is an excellent example of "mimicry," whereby a harmless insect acquires the distinctive appearance of a harmful one, and so secures immunity from the attacks of its natural enemies.