Related Clues:

• Colonial group
• Formicary creatures
• They head for the hills
• Dance if they're in your pants
• Picnic hamperers
• Soil aerators
• Busy builders
• Echidna's snacks
• They may be in one's pants
• Silent army
• Aardvark's lunch
• Small hill builders
• They live in a hill
• Aardvark's entree
• Entomologist's specimens, perhaps