Continue along the path to find the Declassify Skull. This will enable the locust to use smoke grenades to reduce visibility. Continue inside the villa and clear the room. Watch your shots as the smoke grenade will greatly reduce your visibility in the room. After clearing the room, continue outside and take out more grubs.
Head to the exit but before completing the section, continue past your team to see a COG tag skull. The COG tag is right in front of it, beside the electric post. Regroup with your team to complete the section.