40 Mr. H. T. Stainton's Monograph of Micropteryx. 



and rather before the middle of the wing is a slender, almost per- 

 pendicular, silver fascia. Cilia golden brown. 



Anterior wings of the $ (entirely destitute of the silvery mark- 

 ings) golden brown, with the costa at the base purple. 



Posterior wings pale grey, with the apical half tinted with 

 purple. 



Hitherto scarce in this country. Mr. Stephens has specimens 

 from Darenth Wood, and Mr. Thomson once met with it on the 

 grassy bank between Sydenham and Penge. 



The best character by which to distinguish the $ of this species 

 from the $ Seppella is the position and form of the fascia ; it is 

 more slender, straighter, and placed nearer the base than in Seppella. 

 The entire absence of the silver spot on the costa towards the 

 apex would appear at first sight a more decided character ; but it 

 is often no easy matter to see this spot in set specimens of Sep- 

 pella ; and I last week took a specimen of Seppella entirely des- 

 titute of this spot, and which I was therefore inclined to take for 

 Aruncella. The anterior wings of Seppella $ are narrower and 

 greener than those of Aruncella $ . I am not at present aware of 

 any character by which to separate the females of these two 

 species. 



Till I received from Herr Zeller specimens of this species as 

 Aruncella, and of Seppella as Eximiella, I had not the slightest 

 conception that my Aruncella and his were not identical. Pode- 

 vinella, Tr., which Zeller gives as a synonym of Aruncella, is most 

 certainly Seppella. 



How many similar errors may lurk undetected for want of 

 comparison of specimens, it is impossible to say. 



