THE YOUNG NATURALIST. 



[February 



squarish mark of brownish-grey, and a fine sub-ventral line of 

 similar tint much interrupted ; the wing-covers brownish-grey with 

 whitish rays" ("Entomologist's Monthly Magazine," Vol. XII., p. 234). 

 Figures of the different stages of this species are given in the July 

 number of the "Entomologist" Vol. XV., together with its food plant. 



Habitat — With regard to the habitat of this species it may 

 probably be found in Britain wherever Tanacetum is abundant, Mr. Sang 

 "Entomologist's Monthly Magazine," Vol. XVIII., p. 144 writes: — 

 " Dichvodactyla does not hibernate in the imago state. The female 

 oviposits at night — most usually quite after dark — with its abdomen 

 thrust down among the disc florets of the tansy flowers." The larva 

 may be found mining into the stems of Tanacetum. There are very 

 few recorded British localities ; most of the specimens in our cabinets 

 have come from the late Mr. Sang of Darlington. Mr. Stainton records 

 it from Chudleigh, and Messrs. Porritt and Dennis from Saltburn ; 

 Mr. Porritt also informs me that one specimen has occurred near 

 Huddersfield (in litt.J, and Mr. T. J. Henderson that it occurs at 

 Glasgow and Dunblane (in litt.J. There must be many other localities, 

 but it is rarely distinguished correctly from bertrami, and thus, I pre- 

 sume, is often overlooked. Dr. Staudinger in his ' Catalog ' gives 

 " Central Europe, Russia and America," as the extent of its distribution. 



P. bevtrami, Rdss=pallidactyla, Haw. This is the ochrodactylus of 

 Stainton's "Manual" Vol. II., p. 440. Bertrami was substituted 

 owing to the ochrodactyla of Hiibner being referred to the prior 

 species. It is in Britain a much commoner species than the last, 

 and is popularly distinguished as the "yarrow" feeder. There is 

 not the remotest doubt however, that Haworth's pallidactyla is much 

 the prior name. 



Synonymy — Pallidactyla, Haw., " Lep. Brit." p. 478. Bertrami, 

 Roessler, 'Wiener Ent. Monatschrift ' (1864), 54. Ochrodactylus, 

 Tgstr. Bidrag, 154; Sta. Man. II., p. 440. 



It is with the utmost diffidence that I add the pallidactyla, Haw., 

 as a much prior name to bertrami, Rossi. My researches into sy- 

 nonymy relating to the " plumes," for the purpose of these papers has 

 thoroughly convinced me that Dr. Wocke knew practically nothing 

 about our British plumes, and has been most unfair in the use of 

 Haworth's synonyms. Haworth's description of pallidactyla could 

 only apply to this species in Britain as dichvodactylus had not been 

 differentiated, He writes :—" Alucita. (The pale Plume). Alis 



