Mr.
Walsh's paper "On certain Entomological Speculations of the New England School of Entomologists" was published in the "Proc.

Entomolog.Soc.

of Philadelphia," September 1864, page 207.) I am delighted at the manner in which you have bearded this lion in his den.

I agree most entirely with all that you have written.

What I meant when I wrote to Agassiz to thank him for a bundle of his publications, was exactly what you suppose.