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Sphecoidea (bees, digger wasps, sand wasps; order Hymenoptera, suborder Apocrita) Superfamily containing two families of hunting wasps, Ampulicidae and Sphecidae, and 11 families of bees, Andrenidae, Anthophoridae, Apidae, Colletidae, Ctenoplectridae, Fideliidae, Halictidae, Megachilidae, Melittidae, Oxaeidae, and Stenotritidae. The Sphecoidea differ from all other Hymenoptera in the structure of the pronotum, the lateral lobes of which do not reach as far as the tegulae, or extend to below it. The posterior pronotal lobe is rounded and limited to the spiracular cover.