chief originator of some researches into them, foil up by Mr. Walsh, of Illinois, who has contributed val information respecting them to the Entomological So of Philadelphia, published in their proceedings.
Having myself been an observer of Halls and sii excrescences for 20 years or more, and having colit most of the British species, and some American during a visit to that country, I am preparing a vo] to contain the result of these observations. This \ will include drawings and descriptions, with some atte at classification. A coloured drawing of mch will be g where practicable, and a description of every known ( as far as my own observation extends, including tl described by others, not omitting some similar cxcrescei known as Pseudo or Semi-Galls, whose production 1 be variously accounted for.
An Artist in London has been engaged to mi drawings from specimens for the volume now propos and he has already produced some beautiful and fai ful delineations.
Reing desirous of making the work as complete possible, 1 shall esteem it a favour, if any Xaturalist w may have observed or may possess any Galls, wherev found, not hitherto known or described, would connmn cate with me, and furnish any particulars respecting thei Probably many during their summer excursions may me with something in this way either new' or interesting.
I may add that I am in want of specimens to dr.v from of the leafy Gall occurring on Genista Tinctoria, c which I have description, but have not succeeded i meeting with it.
WILSOX ARMTSTEAL*.
Virginia House, Leeds,
Oth Month 1 2th, I860.