Opinions vary as to whether Angle-barred Pug and Ash Pug are separate species or different forms of the same species using different foodplants.
In the 2000 version of the British list, Ash Pug is recorded as a form E. innotata f. fraxinata.
There is also a view that Angle-barred Pug does not occur in this country, and that they are all forms of Ash Pug.
G. Haggett (1963) published a detailed review and concluded that all supposed British records of E. innotata (Angle-barred Pug) should not be regarded as distinct from E. fraxinata (Ash Pug). Riley - [BAIPM]
Verification Grade Comment: Ash Pug
Recorded in 32 (43%) of 74 10k Squares.
First Recorded in 1873.
Last Recorded in 2021.