Biology Reference
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762
761
761 Larva of November moth ( Epirrita dilutata ).
762 November moth ( Epirrita dilutata ).
763
764
763 Female mottled umber moth ( Erannis defoliaria ).
764 Male mottled umber moth ( Erannis defoliaria ).
765
Epirrita dilutata (Denis & Schiffermüller)
( 761-762 )
November moth
A generally common woodland species and sometimes
a minor pest of trees and shrubs, including birch
( Betula ), crab-apple ( Malus ), elm ( Ulmus ), hawthorn
( Crataegus ), maple ( Acer ) and oak ( Quercus ). The
larvae occur in small numbers on cultivated plants,
browsing on the foliage from April to June, and
contributing to damage caused by various other spring-
feeding species. Fully grown larvae ( c . 30 mm long) are
rather plump and bright velvet-green (but greenish
white below), with small, pale pinacula, reddish-brown
spiracles, a creamy-white subspiracular line and faint
whitish lines down the back; the back sometimes
also bears a series of purplish-red, diamond-shaped
markings. Adults (32-38 mm wingspan) are dull
greyish to black, with wavy crosslines. They occur
mainly in October and November.
765 Larva of mottled umber moth ( Erannis defoliaria ).
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