52 RHYAGIA. By W. Wabbbn. 



plumbea. R. plumbea Alph. Forewing leaden fuscous, frosted with pale scales; the lines whitish; stigmata 



defined by whitish, the orbicular small and round; hindwing whitish, suffused with fuscous along termen; 

 fringe white. W. and E. Turkestan. 



R. subplumbea Stgr, (He). Forewing brownish fuscous, the costal half generally blackish; a 

 reddish tinge along submedian fold; the upper stigmata black with reddish grey margins; the orbicular 

 variable, round, or oblong, or large and subquadrate ; submarginal line pale; hindwing dirty whitish, with 

 veins and margin grey ; head and thorax blackish, contrasting with the whitish abdomen. Kuku Nor, Tibet. 



astigmata. R. astigmata Hamps. Forewing rufous fuscous in the cf, blackish fuscous in ¥; the basal and 



terminal areas darker; the lines black; veins towards outer margin blackish; no stigmata, but a dark stain 

 on the discocellular ; a bright white line at base of fringes; hindwing fuscous. Gyangtse, Tibet. 



quadranguia. R. quadrangula Zdt. (= rava H.-Sch.) (12 e). Forewing sombre fuscous, the stigmata darker with 



faintly paler edging, but very obscure; hindwing fuscous. Greenland, Labrador, Nova Scotia, Iceland. 



rattus. R. rattUS Alph. Forewing brownish grey with a vinous tinge; like quadrangula, to which it is nearly 



allied, but the two stigmata are farther apart, and the antennal ciliations shorter; hindwing pale grey. 

 Described by Alpheraki from a single worn d" from Tibet, Amdo. 



laetifica. R. laetifica Stgr. (12 e). Forewing ochreous grey, with darker grey suffusion, especially along costa; 



veins dark; stigmata indistinct, with dark centres and paler rings; orbicular flattened; reniform with lower 

 lobe blackened; submarginal line pale; hindwing pale grey. Mountains of Mongolia. 



diplo- R. diplogramma Hamps. (II f). Like proterva Fung., but smaller; forewing fuscous grey; inner and 



gramma. ouxer lines blackish, paler edged; a dark median shade; stigmata hardly visible; hindwing fuscous grey. 

 Askhabad. 



ignobilis. R. ignobilis Stgr. (= monogramma Hamps.) (11 h). Forewing shining grey, thickly and minutely 



black-speckled; the two upper stigmata pale, with dark centres; claviform often obsolete; outer line strongly 

 dentate; hindwing pale grey. W. Turkestan and Kashmir. 



ledereri. R. ledereri Ersch. (12 e). Forewing olive brown with a yellowish tinge; lines dentate, the edges of the 



teeth marked by black spots; stigmata indistinct, separated by a dark shade; hindwing dull grey. Recorded 

 mus. from Turkestan, Mongolia and E. Siberia; — the ab. mus Alph. is altogether darker, without the yellow 

 tinge of the type. 



simulans. R. simulans Hiifn. (= tristis F., radicea Esp.) (11 f ). Like latens Hbn. but larger; the forewing 



paler, the stigmata with distinct pale and dark outlines. Occurs in most of the countries of N. Europe, 

 pyrophila. also in Armenia, Kurdistan, Turkestan and W. Siberia in Asia; recorded also from Algeria; — pyrophila 

 suffusa. Schiff. is ochreous grey; — suffusa Tutt (— obscurata Stgr.) is darker, the forewing being blackish grey; — 

 latens. latens Stph. (1 1 f ) is unicolorous black , with still more intense markings. — Larva dark brown ; the sub- 

 dorsal area brownish flesh-colour; dorsal line thin, pale, edged with black; a row of dorsal V-shaped 

 marks ; an interrupted white lateral stripe ; on various low plants. 



lapidosa. R. lapidosa Graes. Like simulans Hiifn., but forewing darker, more uniformly coloured, the apex 



more produced; a black streak from base; the two lines double, black, both more oblique than in simulans; 

 stigmata partially dark -edged; hindwing dark grey. Amurland. Described by Graeseb, from 2 cTo 71 from 

 Pokrofka. 



latens. R. latens Hbn. (= murina Frr., latitans Gnen.) (11 f). Forewing dingy luteous grey, varying from 



pale to dark; in pale examples the outer and inner lines are sharply black; stigmata in all cases indistinct; 

 hindwing of ? fuscous, of <? dull whitish with grey border; the veins and postmedian line grey. Occurs 

 in France, Germany, Austria, Hungary and Switzerland; recorded also from Italy and Norway. — Larva 

 yellowish brown; dorsal and subdorsal lines pale, the latter bordered inwardly by a black line thickened 

 at middle of each segment; lateral line conspicuously black; head yellowish brown, with two dark streaks. 

 On grass and low plants. 



ashworthii. R. ashworthii Dbld. (= vallesiaca Stn. nee Boisd.) (11 f). Smaller than candelarum, pale slate grey, 



thickly dusted with blackish, without any rufous tinge; median shade generally thick and diffuse, forming 

 a spot between the pale stigmata; outer line sharply dentate; a dark blotch on costa before submarginal 

 line; hindwing brownish grey, paler in cf; fringe whitish. North Wales. — Larva dark greenish grey or 

 blackish green with an obscure row of subdorsal black rectangular dashes ; feeding on various mountain 

 low plants. 



candelarum. R. candelarum Stgr. (= candelisequa Hbn. Noct. nee Hbn., Vog. & Schm.) (11 g). Forewing chalk 



grey, tinged with brownish and dusted with grey; costa dark-spotted; upper stigmata with brown edges; 

 submarginal line preceded by a gre3' shade; hindwing white, towards termen fuscous. Generally distributed 



