Macrophya blanda - Flecked Strider

Mostly found south-east of the Wash-Humber line, with scattered records north to Yorkshire and a single Welsh record. The only records from Scotland derive from Benson (1952) stating that the range extends north to Berwickshire and Roxburghshire. Has seemingly increased in recent years (Musgrove, 2023).

This species is similar to Macrophya annulata but has a conspicuous white fleck on the hind coxa (on the sclerite, not the membrane). The red girdled abdomen may be infuscate in the middle on the dorsal surface, or may be absent altogether. The species is associated with wooded areas.

Macrophya blanda larvae are present between July and September on raspberry, blackberry, creeping cinquefoil and possibly other rosaceae. They develop over an eight to ten week period before entering a two to three week eonymph stage in leaf litter. It then burrows to hibernate under ground.

Jump to other Macrophya species

Size: 10 - 12.5mm

GB IUCN Status: Least Concern
GB Rarity Status: None

Distribution: England, Scotland, Wales

Flight period: May to July

Plant associations: Rubus idaeus, Rubus fruticosus, Potentilla reptans (raspberry, blackberry and creeping cinquefoil)

References:

Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London

Chevin, H. 2002: Biologie et description de la larve de Macrophya blanda (Hymenoptera, Symphyta, Tenthredinidae). - Bulletin des Naturalistes des Yvelines, Versailles ser. 5, 29(4): 66-69

Liston A, Knight G, Sheppard D, Broad G, Livermore L (2014) Checklist of British and Irish Hymenoptera - Sawflies, ‘Symphyta’. Biodiversity Data Journal 2: e1168. https://doi.org/10.3897/BDJ.2.e1168

Macek, J., 2012. About Macrophya parvula and larvae of several Central European Macrophya (Hymenoptera: Tenthredinidae). Zootaxa, 3487(1), pp.65-76.

Musgrove, A.J. 2023. A review of the status of sawflies of Great Britain - Phase 2: The Athaliidae and the Tenthredinidae (excluding Nematinae). Natural England, unpublished