RK-336

Philadelphia June 5 1857

Dear Sir

I was preparing to write to you when I received your letter of 29^th May, in which you express considerable anxiety about the insect-pins which my father promised to send you.

These so long expected pins have at last arrived, but instead of being what we expected, turn out to be nothing more than common pins of rather better kind than ordinary, of course I refuse to take them. I regret exceedingly that you are thus disappointed in the receipt of what is so materiallly wanted by every entomologist, I shall however send immediately to Berlin, by a reliable way and hope to obtain every thing that we wish for in the course of two or three months. When I have time to spare, I will look over our pins, and send you on all that I can.

Accept my sincere thanks for the mammals you were so kind as to send me, the Hesperomys you will find described by me under the name of H. cognatus in the proceedings of our Academy. Vol VII. pg. 442. I cannot find any that Bachman every gave the name of Mus Michiganensis to any animal of this family. Be kind enough to let me know where you find this name.

I shall be very much gratified to receive from you any other species of small mammals, that you may meet with, among others all species Bats except the V. novebovasensis. Rafinesque describes many curious animals inhabiting your prairies, whether they have any real existence it is hard to say.

The species of Hyla which you mention as found in Illinois I should like to have, likewise a skin of a each species of sqirrel inhabiting the prairie

I am happy to have entered into a