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its common characteristics : but the flesh of the always-hollow stem is always 

 yellow either wholly or only at the margin, while the flesh of the solid stem of 

 Ag. albobrunneus, though it may become hollow when old, is always white ; the 

 apex of the former is perfectly naked but of the latter albo-farinacexis. The 

 gills of Ag. flavobrunneus are emarginate with a distinctly decurrent tooth, and 

 its pileus has always a reddish or yellowish tint, while the gills of Ag. albobrun- 

 neus are rotundato-emarginate and not decurrent, and its pileus is brown. 



In fine, Ag. flavobrunneus has a strong smell of fresh meal, while Ag. albobrun- 

 neus according to Fries has no smell. I have had no opportunity of correcting 

 my impressions since last October, but if I remember rightly some specimens 

 which I brought to Hereford last year, and which were universally admitted to 

 belong to Ag. albobrunneus, had a disagreeable odour. 



Ag. ustalis, Fr., in the form in which I have found it, differs conspicuously 

 from the two latter : its emarginate gills and stem soon hollow, distinguish it 

 from Ag. albobrunneus ; its lack of smell, smooth pileus, the flesh becoming red 

 here and there when broken, distinguish it from A. flavobrunneus. 



Ag. pessundatus, Fr., has a strong smell of fresh meal, the pileus is not streak- 

 ed, the gills are so deeply emarginate as to be nearly free, and the flesh turns red. 

 It has generally a short obese reddish stem, but in mountainous districts a form 

 is found with a white stem three inches long, and with a smaller pileus, which 

 Fries thinks is a separate species if it has no smell, and which then would be Ag. 

 itans, Fr. 



