20 METACHROSTIS. By W. Warrek 



plumbeola. M. plumbeola Stgr. Forewing blue-grey with a yellowish white band before inner line; outer line 



fine : reniform stigma distinct ; some dark clouds before outer margin : hindwing darkgre^y with pale fringe : 

 underside shining yellowish grey; head and thorax yellow, strongly irrorated with grey. Tarbagatai Mts. 



idonea. M. idonea Christ. Forewing grey; the lines black: the basal interrupted and twice waved: the 



inner curved, with a tooth towards base; space between them and a blotch at anal angle pale cinnamon 

 brown: outer line obsolete above: fringe whitish, mottled with grey; hindwing grey, the veins and outer 

 margin darker. Turcomania. 



labecula. M. labecula Led. (4c). Forewing dull grey brown: the markings as in ravula Hbu, but the stigmata 



show fine light edges: median area with a pale yellow blotch below the stigmata; hindwing ashy grey; of 

 the same size, shape, and scaling as ravula; described from a single worn <? from Syria. 



glaucula. M. glaucula Stgr. (4d). Forewing pale blue-grey: the median area, especially in inner half, clouded 



with dark, obscuring the orbicular stigma; reniform plain in a paler space; outer line edged with white; 

 nearest fraudatrhula and ravula, but shorter-winged than the former, and without the black streaks of the 

 latter. From the Island of Askold and Suifun. 



singula. M. Strigula Bklt. (= receptricula Hbu.) (4d). Forewing shorter and broader than in fraudatricula, 



dark grey; lines finely black, the inner nearly vertical, the outer crenulate below, connected by a black 

 streak on submedian fold, followed by a shorter one beyond outer line; some black dashes along course of 

 submarginal line: orbicular stigma usually plainer than the others; hindwing gre3 r , darker towards margin. 

 Found throughout southern Europe, also in Asia Minor and Armenia. - - Larva yellowish grey; dorsal and 

 lateral lines formed of dark brown spots; spiracular line black and distinct: feeds on Parmelia. 



ravuia. M. ravula Hbn. (= lupula Dap.) (4d). Forewing dark grey more or less tinged with brown; lines 



black edged with pale and dark ; the inner vertical ; stigmata distinct, the reniform unusually large ; marginal 

 area with some grey clouds; hindwing dingy grey. In South Europe, Asia Minor and Morocco. — ab. 

 ereptricula. ereptricula TV. (= troglodyta Frr.) (4d) is an aberration with the ground colour darker, and the basal 

 andalusiae. area, as well as patches at apex and anal angle, paler. — ab. andalusiae Dup. (= andalusica H.-Sch.) (4d) 

 is lichen-grey, the a 71 with a white head; this form is found in Asia Minor as well as in Spain, according to 

 Staudinger. Larva blue-grey; the dorsal line black; lateral lines wavy, yellowish red, with black edges: 

 on lichens growing on walls. 



petricoior. M. petricolor Led. (4d). Forewing grey black; markings as in ereptricula, but less white; the 



three black lines edged with reddish yellow; stigmata grey; the submarginal line pale; from Armenia and 

 Pontus. Like ereptricula, but larger. 



galathea. M. galathea Mill. (4d). Forewing dull sombre grey; the lines and stigmata obscure; of the same 



size as muralis, but the wings narrower and the median fascia wider; underside very glossy, grey in fore- 

 wing, white in hindwing; a local species, occurring in S. E. France, North Italy and S. W. Valais. Taken 

 at rest on rock faces. 



tabom. M. tabora Stgr. (4e). Forewing dull dark brown, varied with paler scales; all the markings 



obscure; the inner line alone plainer; orbicular stigma small, round; reniform large, with dark centre and 

 edge; fringe chequered; hindwing dark grey with paler base; intermediate between maeonis Led. and galathea 

 Mill., according to Staudinger, darker and browner than the former, and paler than the latter. Aintab 

 and Mardin in Syria. 



algae. M. algae F. (= spoliatricula Hbn) (4e). Forewing with basal area wholly, and marginal partly, 



pale green, marked with black; lines black, placed as in ravula; the median space brownish; some dark 



marks along the course of submarginal line; hindwing dull grey: found generally throughout Europe, 



degener. except Sweden and Britain. — ab. degener Esp. (4e) is more unicolorous, the pale green clouded with 



mendacula. grey; a dark band beyond inner line. — In ab. mendacula Hbn. (4e) the whole forewing is varied with 



caliigrapha. pale and dark scales intermixed. — ab. calligrapha Bkh. (4e) is a remarkably pretty aberration, in which 



the basal and marginal areas are more or less filled with lichen-yellow. — Larva grey, bluish at the sides, 



with a dark grey dorsal line: feeds on tree lichens. 



simonyl. M. simonyi Eogenh. (- algae var. canadensis Alph., maderensis Baker) (4e). Like algae, but the 



wings narrower, and wholly blackish, without any green tinge; lines as in algae, but somewhat paler. 

 debilis. Occurs only in Madeira and the Canary islands. — The ab. debilis Rbl. is smaller and paler, from 

 Lanzarote Island only. 



