The British Bethylidae (sl)(Hymenoptera) Reference:Richards, O. W., 1939. The British Bethylidae (sl)(Hymenoptera). Transactions of the Royal Entomological Society of London, 89(8), 185-344.URL:https://resjournals.onlinelibrary.wiley.com/doi/pdf/10.1111/j.1365-2311.1939.tb00740.x
