Morley's Final Catalogue: (Referring also to Clouded brindle): These two species, if distinct, are remarkably similar in the extent of their frequency and distribution. Both are found, no more than occasionally and never gregariously, everywhere; on Waldringfield sugar; distinctly uncommonly around both Ipswich and Beccles; neither is noted from Lothingland, now so well-worked.
Recent Suffolk Status: Common. The pale form and the dark f. combusta are both found regularly in the county.
Life history: Single-brooded.
Identification: Clouded brindle has a pale line in the dark outer edge of the forewing and the oval and kidney mark are outlined in dark colouration.
