ACIDALIA. By L. B. Proitt. 61 



as in corrivalaria, from which its coloration does not materially differ. Discal spots black, lines brownish 

 ochreous, first bent in cell, middle line or shade rather thick, curved well beyond discal spot, then somewhat 

 oblique inwards, that of hindwing passing just proximally to the discal spot, usually a little bent round the 

 spot as inocAfo?eMcato,postmedianlijielunulate-dentate, with slight sinus inwards between the radials and again 

 in submedian area; distal shading and subterminal line very weak, distal margin with black dots between 

 the veins, though sometimes very minute. Under surface somewhat paler, especially of hindwing; discal 

 and usually also marginal dots present, forewing with median shade and both wings with postmedian line. 

 Antennal ciliation in the (J about equal to width of shaft, hindtibia strongly thickened, with strong hair- 

 tuft, rather pure white, tarsus scarcely half the length of the tibia. Distributed in Japan, June and July. $$ 

 from Ichang, Chang Yang, and Chia-ting-fu also probably belong to this species as slightly different forms, 

 but in this difficult group I do not venture to decide definitely without the c?. The distal margin of the 

 hindwing is just appreciably bent at the third radial, and one or two specimens apparently referable here 

 have this character a little exaggerated, thus forming rather perplexing transitions towards the eastern forms 

 of nigropunctata. — humilis subsp. nov. looks slightly more slenderly built and smoother-scaled, the distal humilis. 

 margin of forewing slightly straighter, of hindwing more rounded, the median and postmedian lines rather more 

 sharply dentate, the former sometimes little thickened. Under surface of both wings whitish, only the forewing 

 weakly suffused with reddish grey from the base to the median line and from the costal margin to behind 

 the cell; the postmedian line weak or almost absent on the hindwing. The (J hindtarsus appears to be shorter 

 in proportion than in ignohilis and it is by no means unlikely we are dealing with a separate species. Dharmsala, 

 a short series of both sexes in the British Museum collection, erroneously recorded by Butler as Idaea stri- 

 gilata Schiff. and one of them, a worn $, as Anisodes similar ia Walk. A pair from Sultanpur, Kulu, seem to 

 be only a slight subvariety or aberration of humilis. 



A. delitata sp. nov. (7 b) Similar to ignohilis, but almost entirely without any yellowish tinge, the colour delitata. 

 being pale, glossy, whitish grey, the markings very weak. In these respects and in having the forewing slightly 

 narrower and the hindwing inappreciably bent at the third radial, bears a slight superficial resemblance 

 to the pale forms of Ptychopoda inornata Haw. The lines follow approximately the same course as in ignohilis, 

 but the postmedian is less dentate and less bent. The discal spots are very small but black, the black marginal 

 dots minute. Fringes slightly more inclining towards yellowish, only their basal part dusted with grey. Fore- 

 wing beneath suffused with shining reddish grey, lines and cell-spot weak, the median line appearing somewhat 

 straighter than in ignohilis. Hindwing beneath whitish, the discal dot distinct, postmedian line very faint or 

 almost obsolete. Antennal joints a little projecting, the fascicles of cilia rather stronger than in ignohilis. 

 Hindtarsus about half the length of tibia. Face and vertex respectively black and white, as in the allied forms, 

 but the latter bounded posteriorly by a rather broader black line or bar than usual; collar brown. Chow- 

 pin-sa, Western China, occurring in May — June. Described from 3 ^^, all formerly in the Leech collection, 

 the type and another now in the British Museum, the third in the Pungeler collection. Possibly really nearer 

 to hifalsaria, which has nearly the same size, shape and colour, but is very slightly broader-winged, slightly 

 greyer, the discal spot of the forewing not black, a band distally to the postmedian and several other slight 

 differences, and the hindtarsus of the ^ rather more than half the length of the tibia. 



A. butyrosa PFajT. (7 b) may be easily recognized by its bright shining straw-yellow colour, with the mar- butyrosa, 

 kings only slightly darker. Forewing with first line weakly curved, cell-spot rather large, but indistinct, median 

 line excurved beyond cell, gently incurved posteriorly, postmedian sinuous and somewhat dentate, the pale 

 subterminal scarcely defined. Hindwing similar, without first line; cell-spot small. Underside of forewing 

 duller, of hindwing paler, both very weakly marked, the hindwing sometimes without markings. Hindtibia 

 of (J strongly thickened, tarsus short. Discovered at Sikkim, but reaches Dharmsala. 



, A. arenosaria Stgr. (3 k). This and the three following species are also yellow, but of an entirely different arenosaria. 

 shade from that of butyrosa, less glossy and inclining more to light sulphur-yellow. The distal margin of the 

 hindwing is also less strongly convex than in butyrosa and the species which precede it; indeed it is in general 

 rather straight from the anal angle to the middle or beyond, arenosaria is distinguished by the whitish, 

 unmarked hindwing, while the forewing also is pale and weakly marked, the only conspicuous marking being 

 the moderately thick ochreous-brown line beyond the middle, though a minute cell-spot and a pair of fine sub- 

 marginal lines are also traceable. Forewing beneath nearly as white as hindwing and almost without markings. 

 (J antennal ciliation moderate, hindtibia rather short, tarsus about equal in length to tibia. Only known from S. 

 E. Russia. 



A. albiceraria is closely related to the preceding species, perhaps slightly narrower-winged; in the only 

 specimen which I have been able to examine the first subcostal vein of the forewing arises before the end of 



