63.089 Agriphila tristella (Common Grass-veneer)
ws: 25-30mm; Jul-Sep; various grasses; common throughout GB
Agriphila tristella §1
ID: See Agriphila selasella vs tristella for a detailed comparison of these two similar species.
A.tristella can be identified by a prominent facial cone; much less prominent in A.selasella.
The typical forewing pattern of A.tristella shows a yellow median streak with a narrowing at 1/3 to 1/2 and 4 prominent terminal 'fingers' and a trace of a subterminal line; while A.selasella typically shows a white median streak of fairly constant width with 2 indistinct terminal fingers and no trace of a subterminal line.
Male genitalia: Aedeagus with many small cornuti; Projection from base of dorsal margin of valva pointed at apex; blob at end of gnathos rounded
Female genitalia: the sclerotised section of the ductus bursae is equal to or slightly longer than the diameter of the antrum.
A.tristella can be identified by a prominent facial cone; much less prominent in A.selasella.
The typical forewing pattern of A.tristella shows a yellow median streak with a narrowing at 1/3 to 1/2 and 4 prominent terminal 'fingers' and a trace of a subterminal line; while A.selasella typically shows a white median streak of fairly constant width with 2 indistinct terminal fingers and no trace of a subterminal line.
Male genitalia: Aedeagus with many small cornuti; Projection from base of dorsal margin of valva pointed at apex; blob at end of gnathos rounded
Female genitalia: the sclerotised section of the ductus bursae is equal to or slightly longer than the diameter of the antrum.
§1 Galmpton, Devon; 25/07/2010; fw 14.9mm
§2 Foulness, Essex; 01/09/2012; male
§3 Foulness, Essex; 01/09/2012, female; fw11.7mm
§4 Fersit, Inverness-shire; 31/07/2013; male; fw 11.7mm
§5 Pound Wood, Essex; 23/07/2019; male; fw 12.5mm
§6 Bampton Grange, Cumbria; 24/07/2020
All images © Chris Lewis
§2 Foulness, Essex; 01/09/2012; male
§3 Foulness, Essex; 01/09/2012, female; fw11.7mm
§4 Fersit, Inverness-shire; 31/07/2013; male; fw 11.7mm
§5 Pound Wood, Essex; 23/07/2019; male; fw 12.5mm
§6 Bampton Grange, Cumbria; 24/07/2020
All images © Chris Lewis
Page published 05/02/2012 | Extensively revised 02/11/2012 (§1-3) | §4 added 27/12/2013 | Text amended 10/06/2019 | §5 added 29/02/2020 |
§6 added 02/02/2021
§6 added 02/02/2021
