TRIFID.E. 71 



large, rounded, pale smoky-brown, with a rather darker 

 central transverse slender line, cilia similar. Female a little 

 larger, and having the body very stout, the antenna) thread- 

 like, and the anal tuft narrower ; otherwise similar. 



Underside of the fore wings dull mouse-colour, the 

 middle portion covered with long prostrate hairs ; ^ costal 

 region dusted with yellowish-white; nervures tumid and 

 dusted with pale brown; hind wings very similar, rather 

 whiter in the middle, much dusted with brown along the 

 costal and apical regions ; central spot smoky -black ; beyond 

 it is a smoky-brown transverse stripe, and along the hmd 

 margin another. Body dull mouse-colour ; leg-tufts similar ; 

 legs rather browner. 



Extremely constant in colour and markings, but liable to 

 fade in time toward lighter brown. 



On the wing in August and September. 



Larva stout, cylindrical, bat tapering from the third 

 segment to the head, which is rather small ; also a little at 

 the last two segments. Head shining black-brown, the 

 lobes rather convex and divided; dorsal plate somewhat 

 small, divided in the middle, black ; anal plate obscure ; body 

 segments rather deeply divided; colour yellowish-white, 

 rather shaded with grey in the segmental divisions ; raised 

 spots conspicuous, black-brown ; below the spiracles, which 

 are grey, is a cloudy longitudinal shade; undersurface 

 and legs of the general colour; tip of the anal segment 



grey. 



July and August— but the time at which the larva 

 emerg'es from the egg does not seem to have been noticed— 

 in root-stocks of Pctasitcs rvlgaris, apparently confined to 

 this plant, excavating the interior of the subterranean 

 root-stocks and only occasionally showing indications at the 

 bases of the leaf-stalks. Well known to the local fishermen 

 as a useful bait. It is found by pulling up the long leaf- 

 stalks, and digging into the solid root below them. 



