1885. J 5 



tute of the typical structure, being simply a turned down edge of the 

 shoulder of the wing, not closely appressed, and without the white 

 scales and long hairs. 



In L. musculana this divergence is still greater, the fold consisting 

 simply of a tuft of long reflexed scales, which appears like a decided 

 fold, but which, when accidently turned forward, shows a strong tuft 

 of coarse scales arising from the under surface of the margin, and 

 looking like the singular " prominent " tuft on the wings of the 

 Notodo7itid<e, though in a very different position. 



On the other hand, Tortrix dumetana, diversana, ribeana, and 

 cort/latia, which have no fold, possess the rolled back margin along the 

 middle portion of the costa, often very strongly developed, and this 

 structure is shown in a less degree by T. Forsterana and Jieparana, 

 while in T. ministrana nearly the entire anterior margin is slightly 

 raised in the same direction. 



This tendency to a reflexed margin is shown by very many species 

 in various groups, such as Argyrotoza Comuayana, PentUna pruniana, 

 Calosetia nigromaculana, Coccyx nanana, and JPamplusia mercuriana. 

 It is also observable in Hypermecia cruciana^and especially in its close 

 ally, H. augustana^ in which the raised costal edge is very conspicuous. 

 In Grapliolitha candidulana this structure, towards the base of the 

 wing, amounts almost to a fold, and it is instructive to notice that, 

 while Wilkinson places it (under the name of Wimmerana) in his 

 non-folded family StigmonotidcB, Wocke includes it in hi'A ''folded'" 

 genus Foedisca, very near to expallidana and its allies. On the other 

 hand, parvulana, which has a typical fold, is included in the Flicata 

 by Wilkinson, but by AVocke is placed in the (non-folded) genus 

 Felochrista, with Alhersana. It is fair, however, to add that he marks 

 the species as unknown to him, and only quotes it from Wilkinson. 



(Enectra Filleriana, placed by Wilkinson in his (non-folded) family 

 TortricidcB (and by Wocke between a folded and a non-folded genus), 

 actually has a very slight and narrow fold, starting from the base of 

 the costal margin, and consisting of reflexed scales on a very narrow 

 membrane, and in some individuals a large extent of its costal margin 

 is turned back. 



But the most remarkable circumstance that has come under my 

 notice is the totally unexpected discovery of a fold in one of the. 

 species of Fupoecilia, a genus, and belonging to a family, in which 

 there is usually no indication of anything of the kind. The species is 

 maculosana. It has a very narrow, straight fold of membrane and 



