Roussel 's most important works were the ballets Le festin de l'araignée , Bacchus et Ariane , and Aeneas and the four symphonies , of which the Third in G minor , and the Fourth in A major , are highly regarded and epitomize his mature neoclassical style .
They are Le festin de l'araignée , Bacchus et Ariane , and Aeneas .