The moth is out from late June through July. It is a constant visitor to the sugar patch, and will put in an appearance even when other species refuse to be drawn thereto. It appears to be pretty well distributed over England, and in the southern half at least is not uncommon, wherever there are old-established willows. In the northern counties it seems to be much less frequent, but it is recorded as common or plentiful in one or two Cheshire localities, and is said to be taken by all the Newcastle {9} collectors. In Scotland it has been noted in only a few localities. Abroad, the range extends to Amurland. _Mesogona acetosellae_, Fabricius.--Mr. R. Adkin has a specimen of this Central and South European species. It was taken at sugar on the evening of October 26th, 1895, by Mr. T. Salvage, in his garden at Arlington, Sussex (_Entomologist_, xxviii. p. 316). THE DOUBLE KIDNEY (_Plastenis retusa_). This olive-brown species, shown on Plate 4, Fig. 7, has a reddish-tinged form--ab. _gracilis_, Haw.--but otherwise there is little to be noted in the way of variation. The caterpillar is pale green with three whitish lines on the back, and a narrower and more irregular whitish line low down along the sides; head, yellowish green, or dark brown. Sometimes the body has a yellowish tinge at each end. It feeds on the foliage of sallow and willow, from April to June, drawing together the terminal leaves of a shoot as a retreat. The moth is on the wing in July and August, and is more frequently attracted at night to the aphis secretion known as "honeydew" than to the sugar patch, although it does not ignore the latter altogether, and occasionally enters the illuminated moth trap. Barrett states that he has found it at the flowers of figwort (_Scrophularia aquatica_). Apparently a local species, but found more or less frequently in most of the southern and eastern counties of England, and through the Midlands to Cheshire, Lancashire, and Yorkshire; it is, however, rarely seen in the three last-named counties. The range abroad extends to Amurland and Japan. THE OLIVE (_Plastenis subtusa_).