They are Indios.
Here's a gallery of Mestizos: Mestizos/Tejanos
Some of are obviously more European-like than others.
It is in regards to the origin of the folks in the pic, which is CLEARLY identified.
Once again . . .
For the internet challenged . . .
Pleast note the internet location of the pix . . .
http://www.webcolombia.com/colombia/Raza_Mestizos_Zamboa_y_Mulatos_1.jpg
It is from COLOMBIA, "Raza" translates to "race" and I hope you can make the association of "Mestizos" to your statement regarding "Mestizos."
Somehow, I would tend to think the Columbians just might be well informed on these matters. Once again that is . . .