The genetic blueprint of the mosquito that spreads yellow and dengue fever is more complex than the one that carries malaria, and scientists are hoping to use the information to find ways to thwart the little killers. Researchers on Thursday published the genome -- a map of all the DNA -- of the mosquito species Aedes aegypti, a connoisseur of human blood that spreads disease in tropical and sub-tropical locales worldwide. The genome, they said, could guide efforts to develop insecticides or to create genetically engineered versions of this mosquito that are unable or less able to transmit the viruses that cause yellow fever and dengue fever.