'166 THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 
exhibition at a public lecture on Ento- 
mology here on Thursday evening next. 
— W. Winter, Aldeby , near Beccles. 
Exchange. — I have the following du- 
plicates, as numbered in the Appendix 
to the ‘ Manual : ’—3, 29, 31, 39, 40, 68, 
70, 71, 72, 145, 179, 186, to exchange 
for 4, 1 1, 19, 20, 21, 23, 32, 33, 34, 38, 
41, 42, 43, 44, 45, 46, and from 50 to 59 
(except 56), 88, 89, 90, 91, 124, 163, 166, 
167, 178. Applicants had better write 
and mention what they have to offer. — 
John Stevens, 24, Bloomsbury Street, 
Bedford Square, London ; Feb. 13. 
The Nottingham Naturalists’ So- 
ciety. — Some years ago a number of 
gentlemen in this town combined to 
form what was called a Natural History 
Society, which, after existing as such for 
a number of years, was merged, in 1853, 
into the Nottingham Naturalists’ Society. 
After a life of seven years, during which 
it has been conducted with more or less 
spirit, this Association has come to be 
regarded as one of the standing institu- 
tions of the town. It has a tolerable 
Museum, in which are to be found 
several rare and valuable specimens — 
geological, zoological, ornithological and 
otherwise ; and courses of lectures are 
delivered at intervels by eminent scientific 
gentlemen. Lately the second annual 
conversazione was held at the Mechanics’ 
Hall. 
A new Professorship at Oxford. 
— The ‘Gardener’s Chronicle’ informs 
us that “ The Rev. F. W. Hope has 
offered to endow a Professorship of In- 
vertebrated Zoology.” Arc we at last 
to have a Professor of Entomology at 
Oxford ? 
LABELLING INSECTS. 
To the Editor of the ‘ Intelligencer.' 
Sir, — That two heads are better than 
one every entomologist must confess; 
and I am glad to see that my letter to 
you about labelling insects (p. 135) pro- 
duced not only a foot-note to the same, 
but also a letter (p. 150) from Mr. Tyrer, 
jun. 
By comparison of the two schemes for 
labelling insects {viz. that per species, 
which I advocated, and which I propose 
in my present letter to call A, in order to 
economise space ; and that advocated by 
Mr. Tyrer, viz. to label each specimen 
with a separate numeral, ad infinitum, 
which I shall call B), I hope to educe a 
complete scheme to supply our entomo- 
logical wants. 
I must premise, in explanation of my 
former letter, that I intended scheme A 
to apply only to Lepidoptera, and to 
those only which are arranged in a 
cabinet, the species inserted being mostly 
well known. I did not propose to apply 
it to species undetermined : the facilities 
now afforded for interchange of know- 
ledge ought to enable every entomologist, 
at least in the winter months, to deter- 
mine all his unknown specimens. 
It is objected to scheme A in the 
foot-note to my letter (p. 136) that con- 
fusion of two allied species occurring, 
the numerals render the register worse 
than useless. To this I answer, not so ; 
for supposing, in a series of Mamestra 
Brassica , the first four specimens are 
correct, but that the fifth is M. abjecta , 
when you have discovered your mistake 
you will re-label the Abjecta as No. 1 
(supposing you had not the species 
before), register it as such, erase the 
false entry in your register to Brassica 
