176 THE ENTOMOLOGIST. 



same as Hiibner's cursoria and everyone else's cursoria, but they 

 are tritici taken in copulation with streaked tritici and occur in 

 equal abundance with these tritici, some forms, streaked and 

 unstreaked, being of equal rarity. The great mass of these 

 forms came from one locality, Deal, but I have a very large 

 number of tritici from other localities, thanks to the kindness of 

 my numerous correspondents. Misled by the text-books, I con- 

 sidered all these striking unstreaked specimens as cursoria, and 

 like many others, put them in my cabinet as such. Newman 

 gives Kent as a locality for cursoria, but I do not believe anything 

 of this form which we can look upon as at all distinct from tritici 

 is obtainable on our Kent coast, and there is no doubt that the 

 endless variation from grey-white to rich red-brown and black, 

 precludes the idea of selecting one special form and saying, 

 " This is cursoria,'' to the exclusion of all others, simply because 

 they are of a different ground colour. 



(To be concluded.) 



CONTRIBUTIONS TOWARDS A LIST OF THE VARIETIES 

 OF NOCTU^ OCCURRING IN THE BRITISH ISLANDS. 



By J. W. TuTT, F.E.S. 



(Coutiuued from p. 155.) 



Leucania, Och., straminea, Tr. 

 The type of this species is described by Treitschke as " Alls 

 anticis pallide stramineis, punctis tribus medio pluribus ad 

 marginem in seriem dispositis nigris ; posticis albis fusco 

 venosis." (Treitschke, 'Die Schmet. von Europa,' vol. v., p. 297.) 

 This typical form, with only " three dots on the anterior wings, 

 besides the row of minute dots on the extreme hind margin, and 

 with hind wings and fuscous nervures," is not at all a common 

 form with us. Generally there are slight traces of a more or less 

 complete transverse row of dots, and traces of a row of dots on 

 tlie nervures of the hind wings, besides which a dark longitudinal 

 streak is found under the median nervure of the anterior wings. 

 In 1888 and 1884 I took a large number of this species in North 

 Kent, and I found it one of the most variable species in its 

 genus. In my long series, picked from a great number, I have 



