Mukrill: The Buleti of the Frost herharium i')2S 



Boletus Satanus Lenz. 



This name appears in an annotated copy of the Amherst Cata- 

 logue in Frost's library. It is represented by three sheets, con- 

 taining seven fair and three poor specimens, none of them distinct 

 from B. luridus. 



Boletus scaber Bull. 



This exceedingly common species is represented by a sheet con- 

 taining two good plants, and another containing four very poor 

 specimens which are both moulded and eaten by insects. Some 

 of the specimens under B. versipellis also probably belong here. 



Boletus serotinus Frost. 



Represented by two sheets containing ten plants rather poorly 

 preserved, collected in 1862 on shady grassy ground late in au- 

 tumn. The description, habitat, and late habit, as well as the types 

 themselves, point to B. Cliniouianus, from which this species can 

 hardly be distinct. 



Boletus sistotrema Fries. 



The single specimen bearing this name is so very poor that it 

 suggests no comment. Frost evidently thought he had what Peck 

 listed under this name in the 23d Report, which proved to be a 

 form of B. piperatus with large unequal tubes near the stem. 



Boletus sordidus Frost. 



Represented by four rather good plants collected on recently 

 excavated earth in woods in midsummer. 



Boletus spadiceus Schaeff. 



Represented by a dozen fair to good specimens, all of which 

 agree well with B. siibtomentosiis. B. spadiceus probably does 

 not occur in America. 



Boletus speciosus Frost. 



This handsome species is well represented by two fine plants 

 cut in half and excellently preserved. Even the color and surface 

 characters of the stem are well shown. 



Boletus Spraguei Frost. 



Represented by two sheets, containing three mature specimens 

 and a cluster of smaller ones, all well preserved. This species is 

 placed by Professor Peck under his B. vennicjilosus, which is, in 



