THE PRESIDENT’S ADDRESS. 
GENTLEMEN, 
When I had the honour of addressing you a year 
ago, it was my duty to record the heavy loss we had sustained by 
the death of two of our members, both Entomologists of the first 
rank, and one of them of European reputation. I am now happy 
to be enabled to inform you that, during the year 1871, our 
Society has suffered no losses by death, either among its home 
or foreign members, neither have we to regret the loss to our 
science of any Entomologist of especial eminence. Yet the 
obituary portion of my address will by no means be a blank, 
since we have lost in the past year four entomological authors 
of some note, while two others died in the latter part of 1870, but 
were not noticed in my last address. 
Rudolf Felder, Doctor of Laws, only son of Dr. Felder, Mayor 
of Vienna, died on. the 29th of March, 1871, at the early age of 
twenty-eight years. He devoted most of his leisure to the study of 
his father’s extensive collection of Lepidoptera, and to the pub- 
lication, in conjunction with his father, of a variety of valuable 
descriptive and classificational papers. Their greatest joint work 
is that on the Lepidoptera of the ‘ Novara’ Voyage, which contains 
descriptions of nearly a thousand butterflies, the largest portion of 
which are illustrated by figures, which are well drawn, beautifully 
engraved, and admirably coloured. The descriptions, which are all 
in Latin, are understood to be by Rudolf Felder, who seems to have 
had a talent for discerning specific differences as well as those more 
important structural characters on which natural genera are 
founded, and the power to express them in terse and well-chosen 
language. By publishing so large anumber of excellent coloured 
