Hylaeus (Lambdopsis) annularis (Kirby, 1802)

Literature

• Baldock, D., Wood, T., Cross, I., Smit, J. 2018. The Bees of Portugal (Hymenoptera: Apoidea: Anthophila) – Entomofauna Suppl. S22: 1–164.
• Banaszak, J. and Dochkova, B. 2014. Bees (Hymenoptera, Apoidea, Apiformes) in the agricultural landscape of Bulgaria: species diversity Journal of Apicultural Science Vol. 58 No. 1 pp. 29-49.
• Else, G.R. & Edwards, M. 2018. Handbook of the Bees of the British Isles. Ray Society, London.
• Falk, S. 1991. A review of the scarce and threatened bees, wasps and ants of Great Britain. Research and Survey in Nature Conservation 35: 1-344.
• Notton, D.G. and Dathe, H.H. 2008. William Kirby's types of Hylaeus Fabricius (Hymenoptera, Colletidae) in the collection of the Natural History Museum, London,Journal of Natural History,42:27,1861-1865.