Hcspcris iiiatronalis. 



137 



tions and found that the "white" were not pure white 

 but pale hlac. Then I kept only plants of this variety 

 through the winter, and first examined them in 1894, 

 when they were in full flower. They flowered in isola- 

 tion and partly pollinated themselves with their own 

 pollen, partly were fertilized by insects. In later years 

 also I have not enclosed this species in bags but have 

 either grown them in an isolated position and left them to 

 be pollinated by insects, or have had them flowering in 

 a little greenhouse entirely built of fine metal gauze, 

 where they fertilized themselves. 



My object was to test the degree of inheritance of the 

 pale, the lilac, and the violet types separately. I shall 

 first give a summary of my experiment. In this table, W 

 denotes whitish, L lilac, and V violet (that is, the color 

 of the W'ild species). The numbers in each case are per- 

 centages of the particular culture; where the culture was 

 too small I have omitted the numbers. 



HESPERIS MATRONALIS. 

 (whitish, lilac, and violet in percentages.) 



Before I come to the description of this experiment 

 it is necessary to give some more details as to the varia- 

 bility of the color of the flower. 



