One of three very similar species. This species is larger than Macrophya ribis and the head around the frons and temples is almost impunctate (in ribis, the head has dense, coarse punctures in these areas).
Macrophya alboannulata specimens have previously been identified as albicincta but were recognised by Liston and added to the checklist. The two species can be separated by the colouring on the hind trochanters and trochantellus. In alboannulata these parts are white with at most a blackish smudge on the underside, whereas in albicincta these parts are largely stained with black on the white. In the male, the labrum is entirely white or rarely weakly stained with black around the margins. In albicincta the labrum is more or less stained with black.
Size: 10 - 11mm
Distribution: England, Scotland, Wales
Flight period: April to July
Plant associations: Sambucus nigra (elder)
Benson, R.B., 1952. Handbooks for the Identification of British Insects. Hymenoptera, Symphyta, Vol 6, Section 2(a-c), Royal Entomological Society, London
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