Abstract
1. A number of mutants affecting changes in the pigment of larval and adultAn. gambiaeare reported.2. Two other pigment characters are also described. One of these, diamond, is probably inherited as a single factor.3. Two of the mutants are sex-linked and the experimental results showAn. gambiaeto have aDrosophilaform of sex-linkage.4. The sex-linked white-eye mutant is shown to be epistatic to the gene for collar and the characters diamond and red stripe.5. Attention is drawn to the difference in sex-linkage betweenAn. gambiae, andC. pipiensandAe. aegyptiwhich may indicate different methods of sex-determination.
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