Related Clues:

• Harvester ___
• It climbs little hills
• Soldier, for one
• Formicary resident
• Small worker
• 'The Naked Jungle' menace
• Pesticide target
• Grasshopper's colleague
• Some colonists or hill dwellers
• Picnic intruder
• Hard workers
• Industrious insect
• Crumb carriers
• Six-footer?
• Them, in 'Them!'