173 Oligia strigilis (Marbled Minor)

73.173 Oligia strigilis (Marbled Minor)

fw: 11-13mm (Waring & Townsend), ws: 24-27mm (MBGBI10); May-Jul; grasses (Poaceae); common throughout GB

Oligia strigilis (Marbled Minor) §3 male

ID: See Oligia. Very variable and cannot be reliably separated from O.latruncula (Tawny Marbled Minor) or O.versicolor (Rufous Minor) without genital dissection. Larger specimens with a chalky white subterminal band and an orange posterior thoracic tuft are likely to be O.strigilis.

Male genitalia: Harpe - long, slender and almost straight; pollex - long and slender; harpe ~same length as pollex

Female genitalia: Distinct constriction between antrum and ductus bursae; fairly large sclerotised area of corpus bursae

Variation
Dissection
Male genitalia
Female genitalia

§1 Foulness, Essex; 12/06/2010; male
§2 Foulness, Essex; 12/06/2010; male
§3 Snettisham, Norfolk; 05/07/2013; male; fw 12.3mm
§4 Snettisham, Norfolk; 05/07/2013; male; fw 12.8mm
§5 Snettisham, Norfolk; 12/06/2014; male; fw 12.8mm
§6 Winterton, Norfolk; 11/06/2015; female;
§7 Foulness, Essex; 13/06/2015; male; fw 11.8mm
§8 Foulness, Essex; 13/06/2015; male; fw 12.2mm
§9 Foulness, Essex; 13/06/2015; male
All images © Chris Lewis

§10 Foulness, Essex; 13/06/2015; male; fw 13.2mm
§11 Foulness, Essex; 13/06/2015; male; fw 12.8mm
§12 Romansleigh, Devon; 24/06/2016; female; fw 11.9mm
§13 Foulness, Essex; 11/06/2016; female; fw 12.6mm
§14 Bampton Grange, Cumbria; 13/06/2017; female; fw 10.7mm
§15 Mull; 21/06/2018; female; fw 11.5mm
§16 Cliburn Moss, Cumbria; 18/06/2020; male; fw 10.5mm
§17 Stour Wood, Essex; 06/06/2021; male; fw 11.9mm