Sutton & Beaumont, 1989: Previously very rare in Yorkshire (Porritt, 1883-86) and then not recorded for many years (YNU, 1970). This species has undergone a remarkable range extension since 1974, although it has not been recorded from VC65.
Beaumont, 2002: Following a substantial increase in records from the mid 1970s this moth appears to have declined again with relatively few records since 1997.
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