The Egyptian stemborer, Egyptian bollworm, spiny bollworm or cotton spotted bollworm (Earias insulana) is a moth of the Nolidae family. It is found in most of Africa, southern Europe, the Near East and Middle East, Japan, Taiwan, the Philippines, Australia and Hawaii. It is a rare in immigrant in Great Britain. The wingspan is 20–22 mm. Adults show strong seasonal polymorphism, depending on the temperature. Two distinct forms are present in some areas: a bright green summer form and a brownish-yellow autumn form.