LOZOPERin.H—ARGYROLEPlA. 329 



wiags moderately broad, not long; costa decidedly arched, 

 apex and hind margin rounded ; pale primrose yellow, at 

 the base of the costa is a faint chocolate shade ; central 

 band rather narrow and a very little oblique, yet nearly 

 erect, pale chocolate, indented above the middle ; beyond is 

 a pale chocolate spot on the costa before the apex, and a 

 smaller one before the anal angle ; cilia pale yellow. Hind 

 wings and their cilia smoky white. Female similar, but 

 with darker hind wings. 



Underside of the fore wings pale smoky brown, margins 

 tinged with ^^ellow. Hind wings smoky white. 



Oa the wing from the end of May till July. 



Larva shining pale yellow with a faintly greenish tinge, 

 raised dots brown ; head heart-shaped ; the hinder edge of 

 the dorsal plate glossy black, rest of that plate pale yellow ; 

 anal plate smoky greenish-grey ; dorsal vessel darker ; legs 

 shining dark brown, ringed with jDaler ; j>rolegs of the body 

 colour. (Sorhagen.) 



August and September in the heads of thistles (C'irshim 

 ulcraccum and C. 2Kdustris), feeding on the seeds, afterwards 

 boring into the stem, remaining there through the winter, 

 and pupating in the pith. 



The moth seems always to frequent marshy spots, espe- 

 cially those in and near woods, and usually is found near to 

 the tall marsh thistle ; it flies willingly by day if disturbed, 

 and is usually caught at that time, but flies naturallj^ in the 

 evening, and will come to a light. Not anywhere abundant, 

 but widely distributed, and to be found in suitable places 

 throughout England to Northumberland and Cumberland, 

 and in Scotland to the Shetland Isles. In Wales it has been 

 taken in Glamorganshire, and in Ireland near Dublin and 

 Belfast. Abroad it is apt to be confounded with the last 

 species, but is reported from Germany and from Lapland, 

 and is probablj' more widely distributed. 



