Question

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

Answer 1

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): = 96Son: = 104–112

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