The pale ochreous brown or greyish ochreous caterpillar has three broken greyish lines on the back; it tapers towards the small head, and the skin of the body is closely wrinkled. It feeds from August to May, or a little later, on the flowers of hawk's-beard (_Crepis_), dandelion, coltsfoot, golden rod, etc., and in confinement it seems to accept most kinds of flowers that are offered, even when widely different. Thus, Mr. Conquest, in 1907, had some caterpillars which hatched during the first week in August from eggs laid on July 25; these were at first supplied with flowering sprays of yellow bedstraw (_Galium verum_), and later on with the flowers of golden rod (_Solidago_). Instead of hibernating, which is no doubt the normal habit in the species, some larvae reared from the egg in confinement and subjected to fostering warmth will grow very quickly and produce moths the same year. [Illustration] 2 Pl. 50. 1, 2. TAWNY WAVE. 3. BRIGHT WAVE. 4, 5. SMOKY WAVE. 6. _ACIDALIA PEROCHRARIA_. 7, 8. SMALL SCALLOP. 9, 10. BLOOD-VEIN. [Illustration] 2 Pl. 51. 1, 1a, 1b. DINGY MOCHA: _eggs, caterpillars and chrysalis_. 2. MOCHA: _caterpillar_. {133} This species has been referred to the genus _Sterrha_, Hubner, but authorities are not agreed as to the validity of this. _Acidalia perochraria._ The species last referred to as _A. ochrata_ was formerly known in Britain as _pallidaria_, and was figured by Curtis in 1831 under that name. Afterwards the name was changed to _perochraria_, and later still the correct name was found for it. How far there may have been confusion of the two species in the records of the present one, I have no means of ascertaining, but probably all but two should properly refer to _ochrata_. The only two known British specimens of _perochraria_ therefore appear to have been captured in the Redhill district of Surrey, one in 1865 and one in 1869. As will be seen on reference to Plate 50, where a portrait of a Continental specimen will be found (Fig. 6), the general colour is much brighter than that of _ochrata_. It will be noted, also, that there are four darker cross lines on the fore wings, and three on the hind wings. The antennae, too, of the male are toothed, and therefore differ from these organs in _ochrata_. THE SMALL SCALLOP (_Ania emarginata_). As will be noted on turning to Plate 50, Figs. 7, 8, the male of this pale ochreous brown species is generally rather larger than the female, and the more ample wings are less acutely angled in outline; the latter sex is also more clouded with reddish brown.