210 D. E. LANCEFIELD. 



3. Scarlet gives a crossover percentage of 2.7 with dichsete 

 and 25.4 with hairless. 



4. Pinkoid is a new second chromosome mutant that appeared 

 contemporaneously with scarlet, and that affects both the color 

 of the eye and the shape of the wings. 



COLUMBIA UNIVERSITY, 

 May, 1918. 



