A new species of parasitoid wasp, Meteorus gigas Aguirre, Shaw and Jones (Hymenoptera: Braconidae), is described from Huila and Santander Provinces in Colombia and from Napo Province, in Ecuador. The new species is diagnosed and is compared to other species in the genus. Inferences about the possible biology of this species are discussed in consideration of the collecting methods used. The new species was most frequently found from Malaise trap samples but to a lesser extent from yellow pans and maxi-net sampling. Despite extensive sampling of caterpillars at this locality, the host of this new species remains unknown.Una nueva especie, Meteorus gigas Aguirre, Shaw, and Jones (Hymenoptera: Braconidae) es descrita para Huila y Santander Provincias en Colombia y de Napo Provincia, Ecuador. La especie es analizada y comparada con otras especies del género. Inferencias sobre la posible biología de esta especie es discutida teniendo en mente los métodos de colecta utilizados.