19 
“RXTRACTS FROM THE PROCEEDINGS 
OF THE 
ENTOMOLOGICAL SOCIETY OF LONDON 
Marcu Ist—JuNE 77TH, 1905. 
Wednesday, March Ist, 1905. 
Dr. F. A. Dixy exhibited some cocoons and perfect insects 
of hybrid Saturnias, and made the following observations :— 
“T ventured some time ago (see Proc. Ent. Soc. Lond., 1897, 
pp. L-liii) to draw attention to the experiments in hybridisa- 
tion made by Dr. Standfuss, of Ziirich, and to lay before the 
Entomological Society a brief summary of his principal results. 
In the year 1898 I published in ‘Science Progress’ a more 
extended account of Standfuss’s work in this direction, giving 
particulars of several of the hybrid forms obtained by him, 
and adding comments of my own on what appeared to be their 
biological significance. This paper is included in vol. ii of 
the ‘ Hope Reports’ (1901), and portions of it may be found, 
though (doubtless from inadvertence) without due acknowledg- 
ment, in the pages of an important work on Lepidoptera, now 
in course of publication, An excellent translation, by Mr. 
E. M. Dadd, of Dr. Standfuss’s account of some later results 
than those recorded in his ‘Handbuch’ (Jena, 1896), was 
also published in the ‘ Entomologist’ for 1900 and 1901. It 
is illustrated by four well-executed photographic plates. 
“Dr. Standfuss has been good enough at various times to 
present me with some of his specimens; these are now, with 
two exceptions, in the Hope Collection at Oxford. 
‘“The examples I exhibit to-night consist of hybrids of two 
kinds. The first is a pair, male and female, of the hybrid 
between Saturnia pavonia, Linn., ¢,and S. pyri, Schiff, 2 (see 
‘Science Progress,’ 1898, pp. 188, 189; pp. 4, 5 of the paper 
as included in the ‘Hope Reports,’ vol. ii, 1901). I have 
