Related Clues:

• Tiny parasites
• Cause of some head scratching
• Wingless blood-suckers
• Tiny pests
• Parasitic pests
• Itch producers
• Disgusting insects
• Dog bane
• Circus performers
• Cooties
• Reason to put on a collar
• Grownup nits
• Grown-up nits
• Nits, eventually
• Parasites