Related Clues:

• Bad picnic omen
• Model Aesop character
• Bug on Escher's Moebius strip
• Hymenopteran
• Spread, as seeds
• Unwanted picnic guest
• Toiler on a hill
• Aesop insect
• Hard-working six-footer?
• Grasshopper's fable counterpart
• Leaf cutter, e.g.
• One in a long line of workers?
• Insect with a queen
• Spread for growth
• Colony insect