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THE YOUNG NATURALIST. [October 



Dr. Jordan writes : — " The larva according to Wallengren, feeds on 

 Senecio nemorensis. It must in England, of course, choose some other 

 plant ; probably also a Senecio (" Entomologist's Monthly Magazine," 

 Vol. VI., p. 121). Again in Vol. VIII., p. 138, Dr. Jordan suggested 

 as probable food-plants Inula crithmoides, Chrysocoma linosyris and 

 Cineraria campestris. To this South adds (' Entomologist,' Vol. XV., 

 p. 33) : — " Heinemann gives Solidago virgaurea as the food-plant. 

 Plenty of this grew in the woods where the insect occurred in North 

 Devon." A specimen is recorded in the " Entomologist's Monthly 

 Mogazine," Vol. XXV., p. 168, where we read :— " Mr. W. C. Boyd 

 exhibited an example of zetterstedtii, taken at Sydenham." The 

 occurrence of the species in this locality, so near London, or rather in 

 the London District, is most remarkable, considering that all our 

 British specimens have previously come from coast districts. 



Zeller describes the larva as " long ; head, small and black with 

 a white spot ; ground colour of segments, yellowish ; the first segment 

 with a transverse row of 4 spots ; 5 spots on the following ; nth seg- 

 ment spotted with black ; the anal segment black (" Isis," 777). 



Pupa. — " long. Slender. Ground colour, light brownish grey ; 

 much marked with brown, &c. ; with a dark median, and a broad, 

 brown, lateral stripe (" Isis." 777). 



Habitat — This species is exceedingly local and occurs generally 

 in woods where Solidago virgaurea abounds. But, at present, the 

 larva has never been found in Britaiu, In the " Entomologist's 

 Monthly Magazine," Vol. VI., p. 21, Dr. Jordan gives this on the 

 authority of Herr Wallengren as a Swedish species, and on the same 

 authority states that it feeds in Sweden on Senecio nemorensis a plant 

 not occurring in Britain. Dr. Jordan further writes : — P. zitterstedtii 

 is one of the rarest of our native plumes and seems as far as we at 

 present know, to be confined to the South-western seaboard. Owing 

 to the kindness of Mr. Doubleday, I have at present two fine speci- 

 mens lent me for examination taken by Mr. Bond on the Cornish 

 coast ; Lynmouth is given as another locality. The Isle of Man and 

 Ireland should be examined for this species. The larva according to 

 Wallengren, feeds on Senecio nemorensis. It must in England, of 

 course, choose some other plant probably also a Senecio." Since then 

 the species has been taken, as mentioned above, in fair numbers by Mr. 

 W. Austin in the neighbourhood of Folkestone and most of us now 



