364 LEPIDOPTERA. 



of the fissure is a wliite stripe, very oblique on the front lobe, 

 broader on the hind ; beyond this is another white transverse 

 line, narrower, produced along the costa to the apex in the 

 front lobe, but only visible on the cilia of the hind ; cilia red- 

 brown interrupted with white; on the dorsal luargin, in the 

 hollowed portion, are short white cilia in which are two small 

 black oblique dashes. Hind wings slenderly divided, pale 

 golden-brown, with the cilia of each lobe smoky-brown, except 

 the hindmost, where on the dorsal margin is a large black 

 triangular tuft edged with white and extending nearly to the 

 tip. Female similar. 



Undersides of all the wings darker brown than the upper, 

 with the white markings repeated, two white patches are 

 very distinct on the anterior lobe of the hind wings. Legs 

 very long and slender, red-brown, prettily barred with white ; 

 body very similar. 



On the wing in June and the beginning of July. 



Larva and Plpa doubtfully described. The late Mr. E. 

 Sliuttleworth distinctly stated that its food-plant is wild 

 thyme, but furnished no details ; this statement, in view of 

 the habits of the sjaecies, seems most probable. iVey, how- 

 ever, describes it " dirty pale green ; head and dorsal plate 

 black, the latter divided by a pale line ; raised dots large, 

 black bearing tufts of bristles," and says that it feeds in the 

 heart-shoots of Stachys alpina and in the late summer in the 

 whorls of flowers o{ MaiTubium. Zeller thought that he had 

 reared it with O.pilosella from Hkracium. Further observa- 

 tion is desirable. 



This moth frequents the slopes of chalk hills and open 

 downs, also any rough ground in chalk and limestone districts, 

 and more especially haunts wild thj-me ani marjoram. It 

 may be disturbed by the foot from its hiding place among 

 the short herbage, but at sunset flies freelj'of its own accord. 

 Found locally, yet often plentifully, in Kent, Sussex, Surrey, 

 Dorset, Somerset, Gloucestershire, Norfolk, Suffolk, Cam- 



