The long, thin, caterpillar is green, with a darker stripe along the back, and a yellowish green stripe on each side; two points on the last ring. It feeds on alder, birch, sloe, and crab; also in orchards and gardens on plum and apple: April to June. The moth is out in July and August. It appears to occur most freely in districts where alder is plentiful, but it is not uncommon in country lanes, especially where these are rather moist. It is one of the earliest Geometrid moths to get on the wing, as it is generally active well before dark. Decidedly more common in some districts than in others, but it may be said to be generally distributed. The range abroad extends to Eastern Siberia, Amurland, and Japan, but the ab._fumosa_ is only known from Britain. PRETTY CHALK CARPET (_Melanthia procellata_). From almost any well-grown hedgerow, in which traveller's joy, or old-man's beard (_Clematis vitalba_) is plentiful, throughout the southern counties of England, this species (Plate 82, Fig. 14) may be disturbed by the beating stick. It is generally to be met with in July and early August, but may be obtained in forward seasons, or in sheltered localities, at the end of June. [Illustration] 2 Pl. 82. 1, 2. SHARP-ANGLED CARPET. 3, 6, 9. BLUE-BORDERED CARPET. 4, 5. CLOAKED CARPET. 7, 8, 10, 11. ARGENT AND SABLE. 12. PURPLE BAR. 13. BEAUTIFUL CARPET. 14. PRETTY CHALK CARPET. [Illustration] 2 Pl. 83. 1, 2. RIVULET. 3, 6. SMALL RIVULET. 4, 5. BARRED RIVULET. 9, 12. HEATH RIVULET. 10, 11, 13, 14. GRASS RIVULET. 7, 8. PRETTY PINION. {205} On the fore wings the dark, slender and wavy cross lines are more distinct in some specimens than in others, and occasionally the blackish blotch on the front margin is traversed by a white line, sometimes by two lines. The caterpillar is pale ochreous brown, with three darker brown lines along the back, the central one slender, spotted with black on the middle rings; usual dots, black, encircled with white; head, marked with a reddish brown triangle. It feeds on _Clematis_ in August and September. Distribution of the species abroad extends to Amurland, and in Japan, Corea, and China it is represented by the darker _inquinata_, Butler. THE RIVULET (_Perizoma affinitata_).