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 trochanter and trochantellus. In albicincta the hind trochanters are predominantly black and the trochantellus usually white with a black spot, whereas in alboannulata the hind trochanters are predominantly marked with white and the trochantellus never has a black spot. In males the labrum of albicincta is at least darkened an the lateral edges to mostly black, whereas in alboannulata the labrum is at most slightly infuscated at the lateral margins.
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
Chevin, H., 1975. Remarques taxinomiques et biologiques sur les Macrophya (Hym., Tenthredinidae) se développant sur Sambuccus (Caprifoliaceae). Annales de la Société entomologique de France.
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