THE ENTOMOLOGIST. 267 
expressed themselves satisfied and pleased with the exchange, 
and in these instances it was found impossible to make a full 
return owing to the few species desiderated. If the London 
entomologists were to take this matter of exchange up, with 
a working committee of half a dozen or so, and some leading 
entomologist as president, a really good club could be formed. 
Should any such step be taken, we shall be most happy to 
assist in any way that we can.—Joseph Merrin ; Gloucester. 
[This explanation or apology seems scarcely required. It 
may be taken for granted that entomologists will not send 
their best captures for distribution in this manner: the 
quid pro quo, or rather the two or three guzds for one quo, is 
the indispensible condition of exchangers; yet they will, 
doubtless, be willing to send duplicates, for which there is 
no more promising market. Mr. Merrin’s statistics show this 
in the most unmistakeable manner: “ out of 13,000 specimens 
fully half were of little or no value, on account of their being 
badly set or in bad condition.” This is a matter of course, 
and always will be so. Entomologists who offer to barter 
Rape for Daplidice, Urtice for Antiopa, and so forth, as we 
are apprised by the exchange lists, would scarcely be likely 
to send their Daplidices or Antiopas to an exchange club.— 
Edward Newman. | 
Canary Tick.—Through the kindness of Mr. Whitehead, 
of Blenheim Court, Dulwich, I have lately become acquainted 
with an Acarus, which infests canaries and, probably, other 
cage birds; it seems to travel principally by night, and may 
be iuduced to quit the cage by covering it with a white 
handkerchief. In the morning the ticks will be found dotted 
all over the handkerchief. Iam prepared to describe and 
name this little mischief-maker, for so it may be called, as it 
seems to be a sore plague to the canaries. I delay, however, 
in the hope that some of my readers may be able to give me 
their experience, and say whether they are acquainted with 
the animal, and whether it has been characterised.—Hdward 
Newman. 
Extracts from the printed Proceedings of the Entomological 
Society, February 6, 1871. 
Mr. Eedle’s Scotch Lepidopteraa—Mr. Bond exhibited 
several species of Lepidoptera taken in Perthshire, last 
