35.070 Monochroa lutulentella (Meadowsweet Borer)
ws: 14-16mm (MBGBI4.2); Jun-Aug; meadowsweet (Filipendula ulmaria); NS-B in fens and damp places in England mostly south of Wash-Severn line
Monochroa lutulentella §1 male
ID to genus: Abdominal S8 forming a complete ring around the genitalia; gnathos absent; uncus absent; sacculus arcuate; aedeagus stout, tapering
ID to species: Forewing without streaks, with only 2nd discal stigma; ws >10mm; abdominal segments 1-4 ochreous dorsally > M.lutulentella.
2 colour forms light ochreous-brown and dark fuscous-brown; the stigma may be obscured in the dark form
Male genitalia: Valva with a broadly rounded and keeled apex, sacculus fairly straight and much narrower than valva; aedeagus with a cluster of cornuti at base of 'neck'
ID to species: Forewing without streaks, with only 2nd discal stigma; ws >10mm; abdominal segments 1-4 ochreous dorsally > M.lutulentella.
2 colour forms light ochreous-brown and dark fuscous-brown; the stigma may be obscured in the dark form
Male genitalia: Valva with a broadly rounded and keeled apex, sacculus fairly straight and much narrower than valva; aedeagus with a cluster of cornuti at base of 'neck'
§1 Orlestone Forest, Kent; 11/07/2018; male; fw 7.1mm; to light
§2 Orlestone Forest, Kent; 17/06/2020; female; fw 8.0mm; to light
§3 Orlestone Forest, Kent; 17/06/2020; male; fw 6.7mm; to light
§4 Orlestone Forest, Kent; 17/06/2020; male; fw 8.3mm; to light
All images © Chris Lewis
§2 Orlestone Forest, Kent; 17/06/2020; female; fw 8.0mm; to light
§3 Orlestone Forest, Kent; 17/06/2020; male; fw 6.7mm; to light
§4 Orlestone Forest, Kent; 17/06/2020; male; fw 8.3mm; to light
All images © Chris Lewis
Page published 21/07/2018 (§1) | §2-4 added 24/01/2021
