168 Mr. E. B. Poulton. Colour-relation between the [Feb. 4, 



Additional notes and general 

 conclusions. 



Probably always towards white. 



Probably always towards yellow. 



Probably towards intermediate, or either 

 side of it, according to the leaf-surface, 

 which forms most of the immediate 

 environment. 



Probably towards yellow, like the small- 

 leaved £. viminalis. 



Evidently strongly towards white, as 

 shown by the 20 instances in the field. 

 The bred larvse may have been affected 

 by disarranged leaves, and they did not 

 reach maturity. 





i-i 



H 



iH 







CM 



Colour of larva; . 











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f-i 











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1 



' 1 ' 













i 







-*-# 

 iH Oi 

 i— 1 



O 



<N 



© 



is 



Q 



1885 

 1885 



1885 



1885 



1885 



1885 



Other 



dates 



Totals 



Nature of 

 evidence . 



Breeding 

 experi- 

 ments 



Breeding 

 experi- 

 ments 



Observa- 

 tions in 

 the field 



Observa- 

 tions in 

 the field 



Breeding 

 experi- 

 ments 

 Observa- 

 tions in 

 the field 



Size of 

 leaves. 



Large-leaved 

 varieties 

 were used 



c 

 — 



P 





Very small 

 and narrow 



Long, 

 narrow, and 

 small 



Moderate 

 size, like 

 those of 

 S. triandra, 

 but smaller 



Description 

 of under 



sides 

 of leaves. 



c 



■ 



(Upper sides 

 are generally 



dark green, 

 and glabrous) 



Whiter and 

 with denser 

 down than 

 the last 



Like 8. vim- 

 inalis 



The young 

 leaves with 

 a glistening 

 silky down, 

 present but 

 less obvious 



on the 

 older leaves 



Food-plant. 



8. viminalis 

 (under 

 sides) 



8. viminalis 

 (upper 

 sides) 



1 



Salix linea- 

 ris (Forbes) 



sS 



Salix alba 



X 



