I found Cnaphalocrocis sp. caterpillars feeding on Echinochloa polystachya grass. Some of the caterpillars were parasitized in the field by this wasp. The caterpillars were fully grown and ready to pupate when the larva of the wasp came out of the body. Then it started to spin its cocoon near by the caterpillar (see picture). The caterpillar was already dead. To which genus and species does this wasp belong?