Complex sentence: The Spheciformes is a paraphyletic assemblage of insect families which collectively comprise the "sphecoid wasps"; these are all the members of the superfamily Apoidea which are not bees, and in older classifications were called the "Sphecoidea".
Split into simpler sentences: The Spheciformes is a paraphyletic assemblage of insect families which collectively comprise the "sphecoid wasps". These are all the members of the superfamily Apoidea, which are not bees and which in older classifications were called the "Sphecoidea".