Simplify the following text for a Grade 4 native English-speaking person.
Original: The name Death 's - head Hawkmoth refers to any one of the three species ( A. atropos , A. styx and A. lachesis ) of moth in the genus Acherontia .
Simplified: The name Death 's - head Hawkmoth is used for three types of moth . The ( A. atropos , A. styx and A. lachesis ) , and are in the genus Acherontia .