TORTRICID.E—PERONEA. 245 



straw-colour, with well marked nervures, and a few black 

 dots on the disk and hind margin. 



AntennEB, palpi, head, and thorax pale yellow-brown ; 

 abdomen dull brown ; anal tuft yellow-brown. Fore wings 

 not very broad ; costa decidedly arched at the base ; apex 

 blunt ; yellow-drab or straw colour, or pale wainscot-brown ; 

 the nervures all prominent ; without markings except a few 

 black dots in the discal cell and a few along the hind margin ; 

 cilia concolorous. Hind wings silky white with white cilia. 

 Female a little smaller ; fore wings slightly more pointed ; 

 often having a longitudinal brown shade or stripe through 

 the fore wings from base to apex, or else a black discal spot. 

 In the first generation this discal black spot is found in both 

 sexes. 



Underside of the fore wings pale drab ; hind wings white 

 dusted with black. 



Only variable in respect of the presence or absence of the 

 longitudinal brown stripe, or the discal black spot. 



On the wing in June and July, and as a second generation 

 from August to November. 



Larva moderately active, rather long, cylindrical, seg- 

 ments deepl}' divided, yellowish-green, with a darker green 

 internal dorsal vessel and subdorsal lines ; head faintly 

 brown ; plates both shining green. When younger pale pea- 

 green. 



May, June, and August ; on Lythruni salicaria, the second 

 generation feeding upon the flowers and residing in the 

 blossom spikes ; the first brood among the young shoots. 



This moth is of a sluggish disposition and hides itself 

 during the day among herbage in its swampy localities, but 

 late at night flies about and sits upon and around its food 

 plant. It is also strongly attracted by light. An excessively 

 local species with us, quite restricted, I believe, to the fens, 

 and most frequently met with in Wicken Fen, Cambs. 

 First found fifty years ago at Whittlesea Mere, in the same 



