208 



CHARLES ZELENY 



accessory factors for high facet number might make a heterozy- 

 gote between bar and ultra-bar resemble a bar female with ac- 

 cessory factors for low facet number. As in the previous case, 

 male mutants can be recognized at once. 



TABLE 1 



Full stocks examined for mutations to bar or ultra-bar. No such mutations were 



found. Temperature, 20° to 22°C. 



lA new mutant, 'oval full,' appeared in this stock. 



II. DATA 



1. Full-eye 



Full-eye stocks of various kinds have been kept for about six 

 years, but without counts of numbers of individuals observed 

 except during the nine or ten months covered by table 1, when 



