126 LEVIDOPTERA. 



become sometimes dark umbreons, with or without a still 

 darker longitudinal middle cloud ; sometimes nearly white ; 

 ia the female, iu occasional specimens, a cloudy brown streak 

 runs into the apex. 



On the wing from June till August. 



Larva three-fourths of au inch long, cylindrical, tapering 

 a very little behind ; the segmental divisions deej^ly cut ; 

 each segment with only one sub-dividing and deep wrinkle ; 

 head brownish-grey or pinkish-grey with an ochreous tinge, 

 having the large ocelli and the mouth brownish ; dorsal 

 plate semicircular, pinkish grey-brown ; anal plate similar : 

 ground colour of the back f)inkish-grey or pinkish-brown, 

 the sides flesh-colour, and the undersurface white; dorsal 

 line very thin, dark greyish-brown or pinkish-grey ; sub- 

 dorsal stripe similar but a little paler ; spiracular lines a 

 little thinner and still paler, blotchy on the thoracic seg- 

 ments; sub-spiracular line thinner still, and of the same 

 pinkish-grey colour ; raised dots small, dark brown, each 

 having a fine bristle of the same colour; spiracles black. 

 (W. Buckler.) 



September till April, May, or even June : in the lower 

 poi'tions of the stems and in the root-stock of the reed 

 (Ai-vndo pAyw/m/<«), feeding on the knots and internal 

 substance, and often living below the surface of the water in 

 which its food-plant grows. 



Pupa three-fourths of an inch long ; moderately slender, 

 of nearly uniform bulk, tapering only at the last two abdo- 

 minal segments ; anal extremity blunt and fringed with a 

 circle of small hooks ; colour pale ochreous-brown, with but 

 little polish. (W. B.) In a silken cocoon usually formed 

 in a last year's reed-stem, and near to the surface of the 

 water. 



The moth hides during the day among reeds, and other 

 coarse fen plants; the form and colouring of both sexes 



