340 LEPIDOPTERA. 



not folded, the disk bent beyond the middle in a sort of 

 rectangular hollow ; hind wings with vein one thickened. 

 We have two species, easily separated. 

 A. Fore wings deep yellow, with a large, hollow, red- 

 brown triangle filling the hind area. X. zwfjaiia. 

 A'. Fore wings pale yellow, with an open brown rectangle 

 beyond the middle. X. lucmana. 



1. X. zoegana, Zi/iw.— Expanse | to f inch (15-19 mm.). 

 Face very oblique, yellow ; fore wings deep yellow with a 

 round brown dot at the riiiddle of the dorsal margin and a 

 large chocolate-coloured triangular loop at the hinder area. 



Antennaj ciliated, yellow-brown, palpi and head purple 

 brown with the face yellow ; thorax yellow with purple 

 margin, abdomen light brown. Fore wings rather elongated, 

 costa gently arched, apex angulated, hind margin oblique ; 

 rich yellow ; the base of the costa, a round subdorsal dot 

 close to the middle, and a broad conspicuous somewhat 

 triangular complete loop, occupying the hinder area, all pale 

 chocolate ; cilia of the same colour. Hind wings smoky 

 brown with pale cilia. Female similar. 



Underside of the fore wings smoky-brown; costa more 

 tawny ; a pale line lies along the hind margin. Hind wings 

 smoky-white. 



An occasional variety has the whole of the fore wings 

 tinged, more or less, with tawny or chocolate-brown. This 

 is known as Ytar. fcmigana. Otherwise there is little varia- 

 tion except in size. 



On the wing in May and June, and probably as a second 

 generation from July to September. 



Larva apparently but little known. Hofmannsays that it is 

 naked and colourless. Machin states that it feeds commonly 

 on roots of Centaurea nhjra. Others mention C. jcuru and 

 C. paiiiculata. Heinemann says in the roots of S(:abios(t 

 colvmharia in June ; but there is clearly much more to be 

 Worked out. 



