THE ENTOMOLOGIST’S WEEKLY INTELLIGENCER. 109 
EXCHANGE. 
Eriogasler Lanestris. — I liave larvae of 
this species to spare, and shall be happy 
to forward a supply to any entomologist 
writing for them, on receipt of a box 
with return postage, or I will pay hack 
postage if lurvie of any local species be 
Sint. — Matthew Harrison, Yarm, 
Yorkshire. 
Pupa: or Cocoons wanted, — Being 
desirous of showing in my cabinet the 
metamorphoses of each insect, I shall 
feel much obliged if gentlemen having 
any unfertile eggs, dead or empty pupa; 
or cocoons (particularly of the Boinby- 
cina) will let me know ; I will pay postage 
and make any return that may be in my 
power. — Kouert Gillo, 4, Somerset 
Jiuildings, Walcol, Bath ; June 27. 
Duplicate Eggs. — I have a number of 
eggs of A. Betularia, which I shall be 
happy to distribute to any collector who 
will forward me a small box and stamped 
envelope. — W. Laycock, Bath Street, 
Sheffield ; June 26. 
Exchange. — I have some fine bred 
specimens of Trochilium Culiciforme, 
iJypoggmna Dispar, Arctia Villica, and 
a few of Theda W-album. My desiderata 
are those numbered in the Appendix to 
the ‘Manual’ as follows: — Nos. 4, 11, 
20, 23, 24, 42, 43, o3, 62, 63, 68, 69, 76, 
77, 85, 86, 88, 90, 92 to 98, 100 to 102, 
109, 112, 113, 115 to 125, 130 to 134, 
136, 138, 142, 155, 157, 178, 181, 187, 
188. As mine are good 1 shall expect 
none but good ones in return. Parties 
had belter write before sending boxes, as 
I do not want the same thing twice over. 
— C. Holyoay, 16, H untsworlh Ter- 
race, Portrnan Market, London, N. W. ,• 
Jane 26. 
Exquisite Penmanship, — Having two 
boxes still in my possession belonging to 
gentlemen sending for ova from me, and 
which I cannot return, owing to their 
being so badly addressed, I hope the 
parties concerned will take the hint whea 
they see this notice, and send a plaitf 
address for them. — W. Lang, John Street, 
Hamilton; June ‘25. 
All gone. — My larvae of Dispar and 
Carpini are all gone, though boxes are 
still coming in by the dozen. — T homas 
Hague, Dog and Partridge” Staly- 
bridge ; June 27. 
Trochilium Culiciforme and Erastria 
Venustula. — I have bred specimens of 
the first-named species and some good 
specimens of the latter to spare, well 
pinned and set. I should be glad to 
receive offers of some of my desiderata 
from my entomological friends. I must 
especially request that insects offered be 
not loaded with so much metal as those 
I sometimes receive from correspondents. 
To save trouble, those gentlemen who 
do not^receive a reply within six days of 
this notice will please understand I am 
not in want of the species they offer or 
that I am already supjilied. — J. Bryant, 
63, Old Broad Street, London, E.C. ; 
July 2. 
Leeds Nalnralisl and Entomological 
Society . — On Monday evening, June 11, 
Mr. J. Blackburn, our worthy Treasurer, 
delivered a very interesting lecture to 
the members of the Society, “ On Ento- 
mology and Botany,” at the Society’s 
room , 1 29, Kirkgate.— Richard W right. 
Secretary. 
AGASSIZ ON SPECIES. 
If we would not exclude from the 
tharaclcrislics of species guy feature 
