BRITISH AND EUROPEAN BUTTERFLIES AND MOTHS. 



8S 



brown, clicquered with black. The hind wings 

 are brownish grey, with dark marginal and 

 curved lines, and whitish fringes, marked with 

 black. The thorax is grey. The abdomen 

 has thick black crests in the male. It appears 

 in July and August, and is found in Southern 

 Europe. The larva is white or yellowish grey, 

 with dark brown spots, which are arranged 

 in median and lateral lines. Above the legs 

 is an interrupted longitudinal black line. It 

 lives in May and June on Parmelia. 



B. ereptricula, Treit. Fore wings dark 

 brown, with the apex, base, and inner margin 

 whitish. The posterior transverse line is not 

 dentated. Both transverse lines are fine, brown 

 and slightly curved. The submarginal line is 

 somewhat paler than the ground colour, and 

 is whitish on tlie costa and inner margin. Both 

 stigmata are indistinct ; they are filled up with 

 grey, and marked with white in front. Tlie 

 fringes are dark, with white dots on the ner- 

 vures. Tlie hind wings are grey, lighter to- 

 wards the base. The head and thorax are 

 brown, with scattered white hairs, and the 

 collar is edged with white. The abdomen is 

 brownish white, with brown dorsal tufts. The 

 moth appears in Southern and South-Central 

 Europe in July, but is rare. The larva is blue 

 on the back, darker on the sides, with the belly 

 grey, and has a black dorsal and lateral stripe. 

 On each segment there are a few hairy black 

 and white dots, and on the sides of the third 

 and succeeding segments red and black squares, 

 connected by a white line. It feeds in a web 

 on wall-lichens in June. 



B. algae, Fabr. The Tree-Lichen Beauty. 

 Fore wings mossy green, with the base brown 

 and the marginal area generally lighter. There 

 are two black transverse lines, bordered with 

 lighter on the outer side. The hinder one 

 forms two whitish dots on the inner margin, 

 and from thence to the front of the anterior 

 transverse line the area is darkest. The stig- 

 mata are not always distinct. The fringes are 

 marked with a double row of spots. The hind 

 wings are grey, with lighter fringes. Tlie head 

 and thorax are like the fore wings, and the ab- 

 domen is coloured like the hind wings, with 

 brown tufts on the back. It is widely distri- 

 buted in Central and Southern Europe in July, 

 but is far from common, and has onlv been 



taken once or twice in the North of England. 

 The larva is grey, with black dots, a grey 

 dorsal stripe, and shining brown head. It lives 

 on tree-lichens in May, and forms its pupa 

 among them. 



B. muralis, Forst. The Marbled Green. 

 Fore wings pale green, varied with white and 

 brown. Both transverse lines are black, edged 

 with white on the opposite sides, and the 

 anterior encloses the large orbicular stigma. 

 There are a few black curved lines from the 

 inner margin to the base. The submarginal 

 line is black and curved, with two indentations. 

 The fringes are white, with black triangular 

 spots between the nervures. Hind wings ashy 

 grey, lighter at the base, with a lunule, a 

 black marginal line, and white fringes. In the 

 female they are paler than in the male. The 

 body is greyish white, with a brown collar. 

 The moth appears in July and August, and 

 is common in Central and Southern Europe 

 on rocks, walls, and parapets, but is local. 

 In England it is common in the Southern 

 counties. The larva is green, with a broad 

 olive-green dorsal stripe, which is bisected bv 

 a white longitudinal line, and with a white 

 lateral streak above the spiracles. It lives on 

 lichens growing on stones in June, and forms 

 a cocoon in a crevice between stones. 



B. perla, W. V. The Marbled Beauty. 

 Fore wings whitish, varied with pale brown- 

 ish, with two fine transverse lines, large grey 

 stigmata, a grey base, and a shade in front 

 of the black marginal line, which is spotted 

 with white. The abdomen is whitish, with 

 dark rings. It is common in Central and 

 Southern Europe on walls and outbuildings 

 in July and August. The larva is grey, with 

 a dorsal stripe composed of red spots and 

 divided by a black line. Above the legs is a 

 double white line, with small shining dots be- 

 side it. The larva feeds on lichens growing 

 on walls. The pupa is convex, ochreous, with 

 brown spots and short terminal bristles. 



Genus Moma, liiibn. 



Fore wings broad, bright green, with slightly 

 oblique uniformly curved hind margins, distinct 

 black and white transverse lines and stigmata, 

 and entire chequered fringes. Hind wings 

 grey, with only a black spot at the hinder 



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