Possible Clues:

• Male worker receiving note about lack of activity?
• Still name insect after beetle species
• Motionless, without current
• Stale like still water
• Foul male only needs new social worker
• Lethargic party type succeeded by new worker
• Only worth one buck to start with, but still it's all gone bad
• Sluggish male new worker succeeds
• Male worker round the north is not moving
• (Of water) motionless