( =i) 
indicate that this species affords another clear instance of that 
type of inheritance. 
“Mr. Prout quotes me (p. 529) as saying that the inherit- 
ance of Melanism in Aplecta nebulosa is not Mendelian, and he 
assumes that perhaps Mendelian inheritance is confined to 
certain species. My words were intended to mean that in that 
species the inheritance of Melanism could not be shown by the 
evidence at present available to follow Mendel’s Law, because 
neither form is a simple dominant over the other, but this is 
no evidence that the Mendelian segregation of the germ-cells 
does not take place. In a species where one colour-form 
is clearly dominant over the other there can be little doubt as 
to the Mendelian inheritance, but in more complicated cases 
such as A. nebulosa much careful experiment would be 
required, before the nature of the inheritance could be worked 
out.” 
Commenting also on Mr. Prout’s paper, Dr. F. A. Drxey 
said that “dominance” in what the author spoke of as the 
ordinary acceptation of the word might or might not coincide 
with Mendelian dominance. It seemed tolerably clear that 
Mr. Doncaster’s suggestion was correct, and that in this 
instance the “black” form, which was dominant in the 
‘ordinary’? sense, was a Mendelian recessive. It should, 
however, be observed that in one instance black and black 
produced an intermediate (Trans. Ent. Soc. Lond., 1906, 
p. 527). 
The cases recorded on p. 529 of Mr. Prout’s very interesting 
paper presented some difficulty. The only possibility seemed 
to be that, as Mr. Doncaster had pointed out, the three wild 
“purple” females there spoken of were hybrids mated with 
recessives. The Mendelian expectation for the offspring on 
this supposition would be 50 per cent. purple and 50 per cent. 
black—a proportion rather widely departed from, especially in 
the case of female (2), whose recessive offspring considerably 
exceeded in number the Mendelian prediction. But the 
numbers of the individual broods were after all far too small 
to give stable conclusions, and if the several results of pre- 
sumably DR xR matings mentioned in the same paragraph 
were added together, the Mendelian proportion would be more 
