Historical clue formulations

• Yellow fever carrier — 2012-01-14
• Dreaded mosquito — 2011-01-18
• Dangerous mosquito — 2003-10-18
• Feared mosquito — 2000-12-12
• Mosquito type — 1998-04-05
• Yellow-fever mosquito — 1997-08-13
• Yellow fever mosquito — 1996-12-09
• Mosquito genus — 1995-08-23
• Yellow-fever mosquito — 1995-02-10
• Yellow-fever mosquito — 1994-09-07
• Infamous mosquito — 1994-02-06