male lethal with normal X (Muller and Stone, 1930) XX females viable (Muller and Stone, 1930) XX females low fertility (Muller and Stone, 1930) Triploid intersexes very low fertility (Pipkin, 1940, Texas Univ. Publ. 4032: 126-56). males die in the egg stage, showing incomplete blastoderm formation (Poulson, 1940, J. Exp. Zool. 83: 271-325).