HYDRELIA. By L. B. Prout. 



269 



H. percandidata Chr. {= candidissima Stgr.). Very like a pmall Asthena alhulata in shape and colour, percandi 

 perhaps .slightly luirrower-winged, the distal margin of the hindvving rather more strongly prominent at the **■ 

 S"* radial. Like chioiiata in having the areole undivided (raliier narrow), with Ihe 1*' subcostal Jirising abfiuf 

 from its apex, cf unknown to me, ? with the antennal joints slightly more projecting than in albulata, minutely 

 ciliated. Forewing with 5 lines, much more slender than in albulata, in part obsolescent, the first 4, however, 

 arising from enlarged brown costal spots; all are strongly sinuous, at the costa about e(|ui(listant, bul posteriorly 

 the 3'''' and 4'*' approach one another; marginal dots small. Hindwing with 2 weak lines behind the middle. 

 Both wings without discal dot. Underside unmarked, except at costa of forewing. Transcaucasia and N. Persia. 



H. flammeolaria Hufn. (= luteata Schiffi, centrata i^., flavicata Thnh.) (10 h, as luteata). Distal margin flammeo- 

 of hindwing sinuous, especially between the radials. Very distinct in the glossy pale yellow ground-colour /«''»"• 

 and thick, undulate deep ochre-yellow transverse lines. The discal dots are dark, but not "black", as described 

 by some old authors; that of the hindwing generally almost lost in the first postmedian line. — Larva nearly 

 cylindrical, green, almost unmarked, at the incisions more whitish. On maple and in some districts on alder. 

 The pupa hibernates. Imago in June or a little earlier or later. Central and Northern Europe, Russia, 

 Armenia, Siberia and Japan. 



H. ochrearia Leech (13 e) is also yellow, but less glossy, of rather a deeper lone and dusted with light ochrearia. 

 reddish fuscous; discal dots wanting and instead of the groups of thick ochre-yellow lines both wings are 

 pretty uniformly traversed by fine, very weak reddish-fuscous lines ; no dark distal streak. Moreover, the 

 wings are umch more elongate, with dark dots at the distal margin. Pu-tsu-fong, W. China; only the type known. 



H. bicolorata Moore. A pretty species, showing — unlike the rest of the group — the normal Larentiid hicolorata. 

 pattern. Reddish grey, the strongly undulate bands which bound the narrow median area yellow, narrowly 

 edged with bright red proximally and distally, and bisected by a thick bright red line; a narrow yellow, red- 

 mixed line bounds the basal ai-ea and another (broader, but somewhat interrupted) traverses the distal area. 

 Hindwing with only the postmedian yellow and red band developed. Underside much duller, with fuscous 

 lines, black discal dots and yellowish, undivided postmedian band. — ab. ferruginaria Moore, which is commoner fen-ugi- 

 than the name-type, has a blackish basal patch and blackish costal half of median band. — Dharmsala. Also nana. 

 in Sikkim the Khasi Hills, etc. 



B. Distal margin of hindwing strongly crenulate (Agnibesa Moore). 



H. pictaria Moore. Forewing very pale yellow with burnt-coloured basal patch and irregular, incomplete pictaria. 

 postmedian band, both overlaid with some metallic scales ; the small black discal dot placed in a slender, 

 curved brown median shade which becomes still more slender and inconspicuous posteriorly; subterminal 

 line indicated by brown (anteriorly black) spots or interi-upted lines which bound it. Hindwing white; rather 

 thinly scaled, with faint grey lines or bands. Under surface similar, the markings of the forewing more 

 blurred. W. China: Wa-shan and Ta-chien-lu. Originally described from Sikkim. 



H. recurvilineata Moore. Both wings silvery white. Forewing with sinuous subbasal dark line, strongly 

 curved antemedian line, black discal dot followed by an excurved line which is coloured orange opposite the 

 cell, 2 sinuous postmedian lines, orange in their anterior half, the distal one here dotted with black: a 

 subterminal line of black dots is often present. Hindwing with black discal dot and fuscous bands. Underside 

 of forewing strongly marked with fuscous. Chang-yang and Omei-shan, small and weakly marked, perhaps a 

 local race. Described from Sikkim. 



recurvi- 

 lineata. 



H. punctilinearia Leech (7 g) differs from recurvilineata in having the orange markings more restricted puncti- 

 the lines more clearly defined, those of the hindwing finer, more widely separated, the two nearest the distal ^neaim. 

 margin dotted with black on the veins, etc. W. China: Chow-pin-sa and ^Kia-ting-fu, June and July. 



H. sanguiniplaga Sivinh. (7 g) is very distinct in the presence of the extended orange apical patch as sanguini- 

 well as in the orange colouring of the basal patch and of the thorax, etc. The wings — as in all the species ?'%«• 

 of the section — are smoothly and rather thinly scaled; the tooth at the end of the 3"^ radial of the Inndwing 

 is more conspicuous than the others. Pu-tsu-fong, W. China, only one specimen known. 



C. Forewing with distal margin elbowed at 'i'^ radial; hindwing more definitely angled 

 at the same point (Autallacta Warr. = Eschatarchia Warr.). 



H. lineata Warr. (= angularia Leech) (l3f). Large for this genus. Brown, forewing with costal margin Uneata. 

 fuscous, both wings with a fuscous line near the distal margin, that of the forewing very characteristically 

 formed, enclosing pale marginal patches. Japan: Gifu, Nagasaki, etc. 



