2g6 LEPIDOPTERA. 



distinctly the iuterual dorsal vessel, and the tracheae with 

 all their ramifications ; on the more olive-yellow examples 

 there occur two parallel brown streaks, low on the sides of 

 the second to fifth segments ; spiracles ringed with brown ; 

 ventral and anal prolegs well developed. 



August till May or June ; on Sjiarganium siinj)lcx, S. 

 ramosum, Nvphar lutca, and Nipnphcea alba ; Ottmar Hot- 

 man adds Fotamoffdon, and Linno duckweed (Lemna) ; 

 mining in the leaves, or when these are young, or too slender, 

 eating them through, but hiding itself then under frag- 

 ments connected together with silk. (W. Buckler, con- 

 densed.) 



Pupa three-eighths of an inch long, slender, the head well 

 produced, the back of the thorax gently rising from it ; 

 width thence uniform to the end of the wing-covers ; leg- 

 covers long, projecting, free from the wing-covers, to the 

 tenth segment ; abdomen regularl}- tapering, and terminating 

 in a hook, curved downwards ; colour deep bright yellow, 

 inclining to orange-yellow ; a narrow brown streak obliquely 

 crosses each eye-piece ; three spiracles on either side are 

 conspicuously promiueut on circular swellings, paler than 

 other parts, and are like nipples of brownish-red with rather 

 darker orifices ; the hinder spiracles flat, brown, and very 

 obscure. In a slight elongated cocoon composed of two 

 pieces of leaf, either floating in the water or fastened at 

 the surface to the side of a growing strong leaf. The cocoon 

 is of white silk, and apparently quite dry within. (W. 

 Buckler.) 



The habits of the moth are almost precisely tlie same as 

 those of the last species ; haunting the margins of rivers, 

 streams, ponds, lakes, broad ditches, and any pieces of water 

 in which water plants abound ; but it is by no means so 

 common nor so universally distributed. It is tolerably frequent 

 throughout England and probably through Wales, since I 

 have found it in Pembrokeshire, and Mr. Day records it as 



