The main melody here, played in thirds by trumpets and violins, is meant to evoke:

I beleive the answer is: Homage to Lorca

The composition of homage to lorca is being done with three movements:

Baile (Dance) : Lento (quasi recitativo)

-Allegro ( = 200) - Lento (quasi recitativo)

Duelo (Affliction) : = 96 Son: = 104-112

And the final movement would be imposed by several ostinatos, a device Revueltas uses for the Oeuvre