Complex sentence: When ants are present on a plant, they rid it of lepidopteran larvae which would feed upon it, such as "Smyrna blomfildia", "Urbanus esmeraldus", and "Pleuroptya silicalis".
Split into simpler sentences: When ants are present on a plant, they rid it of lepidopteran larvae which would feed upon it. Lepidopteran species include "Smyrna blomfildia", "Urbanus esmeraldus", and "Pleuroptya silicalis".