Key to Ypsolopha species

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Features refer to forewing unless otherwise stated.

Termen produced or falcate	ws < 25mm		Y.mucronella
	Apex falcate (hooked)	Mainly straw-coloured	Y.nemorella
		Mainly brown, dorsum cream	Y.dentella
	Paler in costal half, at least basally		Y.scabrella
	Mainly fuscous		Y.horridella
Thorax white			Y.lucella
Irregular black dorsal streak	Ground colour white		Y.sequella
	Ground colour grey to fuscous		Y.vittella
Whitish subcostal streak to at least ½			Y.parenthesella
Head, thorax and forewing mainly pale ochreous	Traces of 2 oblique fasciae from dorsum	Fasciae extend > halfway across wing	Y.silvella
		Fasciae extend < halfway across wing	Y.alpella
Unicolorous	Head white to pale ochreous		Y.parenthesella
Streaked, mottled or unicolorous	Head ochreous to fuscous		Y.ustella