Dear Darwin

I send you by post a pair of the Euchirus longimanus   They are not quite perfect and are very rotten from being kept so long in open boxes but will perhaps answer your purpose.²

I send on the other side two or three notes on sexual differences which I find in an old note book, but I fear there is nothing of interest.

I have to thank you for a most agreeable visit, & my wife was so pleased³   I rather think she was sorry to be obliged to come home again.

With kind regards to Mrs. Darwin & all your family

I remain | Yours very sincerely | Alfred R. Wallace—

Euchirus longimanus.. (Amboyna, Ceram) when in motion makes a low hissing sound caused by protrusion and contraction of the abdomen. When sezed it also produces a grating sound by rubbing the hind tibiæ against the edges of the elytra.⁴

Callichroma dorycus. Boisd. (N. Guinea)⁵ I have a note that the ♂. of this musk beetle has a fine odour of ottar of roses; the ♀ having only a slight disagreeable smell.

Mutilla sp.⁶ (Celebes)

Winged males seize females by head or thorax, fly with them, settle & shake them violently till they submit to cop.

I have a note that the female in the genus Glenea (Longicorns)⁷ feigns death, the male not;—but I sh^d. hardly like to be sure of this.