CATALOGUE OP MOTHS. 245 



"Manual" was published, and there has been considerable 

 difference of opinion as to whether it and the following species 

 bertrami {pchrodactylus of the " Manual ") were really distinct ; 

 this, however, is now generally admitted. The matter was very 

 fully gone into by the late Mr. Tutt in his excellent " Monograph 

 of the Pterophorina of Britain," in which the life history of 

 each species is given and the differences between both larva 

 and imago stated in every detail, together with the opinions of 

 our leading entomologists upon the subject (see pp. 23-31 and 

 31-35.) 



Mr. Sang took and bred this species from larvae got at " Nags 

 Head," near Darlington, and for many years I have found the 

 larvae in abundance on the banks of the Wear at Chester-le- 

 Street, where tansy is very common. Mr. J. W. H. Harrison 

 (late of Birtley) writes me: "This is the commonest of our 

 plumes by far. The larvae are to be had in multitudes on 

 tansy, third week in June, Birtley, Chester-le-Street, Lamesley, 

 etc." 



398. Pteropliorus bertrami, Eossl. 



Pterophorus ochrodactylus. Staint. Man., vol. ii., p. 440. 

 Platyptilia bertrami. Meyr. Hdbk. Brit. Lep., p. 434. 



This species, the ochrodactylus of the "Manual," is now 

 generally known under the name of bertrami. Mr. Tutt, in his 

 "Monograph," says ^'■bertrami was substituted owing to the 

 ochrodactylus of Hiibner being referred to the prior species." 



The " Manual " gives it as occurring regularly at Newcastle- 

 on-Tyne and commonly at Darlington, the latter being probably 

 Sang's record in his diary for Low Coniscliffe, near Darlington, 

 July 1st and 20th, 1874. I have taken it freely flying about 

 yarrow on the railway side at Hartlepool near the ropery, and 

 sparingly in Hezleden Dene. The larva feeds in shoots of 

 yarrow, but last summer (1911) I took three or four specimens 

 of the moth in my garden at Hart, the larvae of which had 

 evidently fed on the garden variety of Achillea ptarmica. 



