I/O I.F.riDOPrEKA. 



minutely dotted with black ; cilia shining greyisli-white, 

 with narrow black dashes. Female rather larger ; its an- 

 tenntc simple ; its coloui's often richer and stronger. 



Underside of the fore wings dull pale smoky-brown, tinged 

 along the costa with green ; second line showing sharply 

 black at the costa, but abbreviated ; outer area pale green. 

 Hind wings smoky brownish-white ; cilia of all the wings 

 white, chequered with smoky-black. Body smoky-brown ; 

 legs darker, front tarsi pale green, barred with black-brown. 



The light bright green in tliis species is so fugitive that 

 only specimens in their pristine freshness are lit for preserv- 

 ing ; after a few hours, or in a day or two, according to the 

 state of the weatlier, every specimen begins to fade toward 

 whitish-yellow ; and t his is accelerated in damji weather, so 

 that dingy yellowish-green S]ieciniens maj' be seen commonly 

 on the wing. In the course of fading the delicate white 

 stripes almost disappear. In the cabinet, when fading has 

 commenced it soon becomes complete, but specimens secured 

 quickly after emergence and kept thoroughly diy will main- 

 tain their green colour for years. 



There is some variation in the size and distinctness of the 

 black costal s])ots, and in the definiteness of the first and 

 second lines ; also in the dejith of colour or of black shading 

 of the central band. In the south of Scotland and the 

 north of Ireland these markings are often very deep and 

 conspicuous. On the othei- hand, some English examples 

 have the central liand no darker than the groiind colour, and 

 the margins uiiblackened. A curious specimen in the col- 

 lection of ^Mr. Sydney AVebb has the band diminished toward 

 the dorsal niai-gin into a perpendicular black streak. 



On the wing in .lune — sometimes in the south at the end of 

 -May — in the jMidlands and the north in July. Specimens of 

 an extri'mely partial second generation may occasionally be 

 met with in S(])tember. 



Lai;\ A short, stout, wrinkled ; having small black tubercles 



