CATALOGUE 0¥ MOTHS. 209 



A generally distributed species, but not abundant any- 

 where in these counties. It is recorded from Muckle Moss 

 in the Transactions of the Society (vol. v., p. 9). Mr. 

 IsTicholson took it at Alnmouth and Lesbury ; Mr. Ehagg 

 at "Warkworth ; Mr. Finlay found it occasionally in most 

 of the woods in his district ; Mr. Corder took it in 

 !Bothal Wood, Morpeth ; Mr. D. Eosie found it at Stocksfield, 

 Kenton, and Dinnington ; Mr. Wailes recorded it from ISTew- 

 castle in Stephen's Illustrations (vol. iii., p. 159) ; and Mr. 

 Henderson found it more recently at Jesmond. Mr. G. IS'owell 

 got three at Axwell ; Mr. Hedworth one at Swalwell in 1872 ; 

 Mr. Brady found a solitary specimen at Eyhope ; Mr. Greenwell 

 got it at Leamside ; it is in the list in Ornsby's Durham ; both 

 Mr. Sang and Mr. Backhouse took it near Darlington, which is 

 also a Manual locality. Dr. Lees took one of the black variety 

 (^Douhledayar^id) in Upper Teesdale, where Mr. Grardner found 

 the type rather common. Mr. C. Trechmann, jun., found a black 

 one in Castle Eden Dene. I generally get one in Hezleden 

 Dene each year, and have found a black one there occasionally 

 in recent years. I took an intermediate form there, and another 

 on the Cemetery palings at Hartlepool, but these are much rarer 

 than either the type or the black form. Mr. Maling once sent 

 me eggs from a black female which had paired with a type male. 

 The progeny were all either typical or black, no intermediates, 

 but there were both sexes of both forms. I tried to pair two 

 black ones, but though the individuals I experimented with, 

 paired readily with the type, they would not pair together. I 

 have had no opportunity to repeat this experiment, which I 

 recommend to those who can readily obtain ova. Betularia is 

 noticeable as being one of the first species to exhibit that ten- 

 dency to melanism which has become such a marked peculiarity 

 in British lepidoptera. A buff or drab variety has also appeared 

 in recent years but not, so far as I know, in our counties. 



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