PTEROPHORID^—1'LA TYI'TIL US. 349 



brown. These seem to me to be practically descriptions of 

 the same species of larva. 



May and June on Achillea millefolium, A. ptarmica 

 (Yarrow and Sneezewort), and Tanacetum vulgare (Tansy), 

 feeding in the heart of a young shoot and eating down into 

 its solid stem, moving, when necessary, to another. The 

 condition in which it passes the winter is not yet ascer- 

 tained. 



PrPA slender with a rather long beak in front bent down- 

 wards at a small angle ; tail pointed ; wing covers of 

 moderate length, well developed ; the ends of the leg-cases 

 free of the abdomen ; pale green, light pinkish-grey or dark 

 reddish-grey ; the beak is white above, blackish at the sides, 

 on the thorax a blackish-brown dorsal stripe widens, and 

 then narrows, thence passes down of uniform width to the 

 tail ; on the thorax it is margined with a white line ; there 

 is an interrupted blackish-brown subdorsal line, and between 

 this and the dorsal stripe on each segment are double dark 

 brown streaks, a little divergent ; these are strongly marked 

 on the anterior segments, more faintly on the hinder ones ; 

 below the subdorsal is another brown line, rather inter- 

 rupted ; lateral line white, bordered beneath by a black 

 stripe ; the ventral surface of each segment has a broad 

 squared mark of light brownish grey, and a fine subventral 

 line of similar tint, much interrupted ; wing cases brownish- 

 grey, with whitish rays. (W. Buckler.) Attached by the 

 anal hooks to a stem or leaf of the food plant. 



The moth hides by day in the tufts of its food plants, 

 keeping very closely concealed, and if shaken out is hardly 

 to be induced to do more than scramble away to another 

 concealment. At early dusk it flies gently about, and is 

 readily seen. Common among its food plants in the rough 

 ground in which they grow, very often in open spaces at the 

 sides of lanes and roads ; also fields, railway embankments, 



