26 [July, 



The remaining species may be generally characterized as dark 

 brown, irrorated with yellow scales, having a more or less distinct dor- 

 sal blotch, beyond it lustrous lines proceeding from the costal streaks, 

 and a row of black dots before the hind margin. 



D. sim])liciana, Haw. (cah'c/inosana, Tr.). — The largest species in 

 the genus, and easily separable by the h'eadth of its wings. Dorsal 

 blotch triangular, wdth its apex pointing towards the hind margin, di- 

 vided from base to apex by a dark line, and aiiteriorly distinctly dark 

 margined. Yellow scales large, not abundant. Lustrous lines leaden, 

 broad and distinct, especially in the female, which has but few of the 

 yellow scales. 



D. tanaceti, Stn. {saturnana, Heinemann). — Nearly as large as 

 simpliciana. Yellow scales small, exceedingly alundant, placed in 

 short lines, and giving the wing a golden ajj^pearance. Leaden lines 

 narrow and dull. Dorsal blotch not triangular, but rather in the form 

 of a head and shoulders, or of a round loaf with a broad base, being 

 constricted above the middle of the wing. In the female this is nearly 

 obsolete. 



The only British specimens I have seen were from Mr. McLachlan, 

 and were bred by Mr. D'Orville from tansy. These agree with con- 

 tinental specimens of Heinemann's saturnana. Zeller says — " It flies 

 "in May among tansy." 



Dr. Wocke (in Stand. Cat.) sinks the name tanaceti into a synonym 

 of plumhagana, Tr., a smaller species, but he gives saturnana, Hein., 

 as a distinct sj)ecies in another sub-genus, and synonymous with 

 another totally distinct species, saturnana, Gn., Wilk., Stn. 



D. plumbagana, Tr. — Smaller, and having narrower fore-wings 

 than the two preceding species, readily recognisable by its hright lus- 

 trous lines. Yellow scales large, arranged in ii'regular lines. Blotch 

 nearly upright, very irregular inform, not triangular, hut dilated at the 

 apex, and divided by two delicate, dark, upright lines. Costal streaks 

 bright silvery, not crossing the wing, hut the pair over the blotch some- 

 times unite ivith an irregular silver-edged patch above the anal angle. 



Dr. Wocke (in Stand. Cat.) seems to have got into a serious con- 

 fusion with regard to this species also : plumbagana, Tr., he quotes as 

 a good species (No. 12S3), making it, however, synonymous with tana- 

 ceti, Stn., but plumbagana of Wilkinson he quotes (with a ?) as a 

 synonym of the previous species, distlnctana, Hein., and again after- 

 wards (with another query) as synonymous with suhsequana, Haw. and 



