88 Thirty-eighth Report on the State Museum. 



A very small species, related to A. paludinellus, {lom which it differs 

 in its smaller size, shape of the spores and brighter colors of the 

 pileus. 



Agaricus (Hebeloma) sordidulus, n. sp. 



Pileus thin, rather firm, convex, viscid when moist, dingy brownish- 

 red or tawny-brown, paler or whitish on the margin, flesh white, with 

 a radish-like odor ; lamellae broad, close, rounded behind, slightly ad- 

 nexed, pallid, then brownish-ochraceous ; stem short, equal, stuffed or 

 hollow, slightly fibrillose, white, pruinose at the apex ; spores subellip- 

 tical, .0005 to .00055 i^* lorigj .00025 to .00028 broad. 



Sandy soil, in open places. Karner. Oct. 



Plant about i inch high, pileus 8 to 15 lines broad, stem 1.5 to alines 

 thick. 



A small species, belonging to the section Pusilli. 



Agaricus (Hebeloma) parvifructus, n. sp. 



Pileus convex, then expanded, slightly viscid, dingy-white, becoming 

 grayish-brown or pale-chestnut colored with age, often paler on the 

 margin ; lamellae broad, moderately close, slightly emarginate, at first 

 white, then brownish-ochraceous ; stem equal, silky-fibrillose, solid, 

 Avhitish, stained with ferruginose or brown toward the base, pruinose and 

 substriate at the apex ; spores brownish-ochraceous, .00025 to .00028 

 in. long, .000 1 6' to .00018 broad; veil white, arachnoid. 



Plant three to four inches high, pileus two to three inches broad, 

 stem three to five lines thick. 



Sandy soil in pine Avoods. West Albany. Oct. 



The spores of this plant are smaller than usual in species of this sub- 

 genus, and this character has suggested the specific name. The lamellae 

 are at first concealed by the copious, webby filaments of the veil. The 

 species belongs to the section Indusiati. 



Agaricus (Hypholoma) madeodiscus, w. sp. 



Pileus thin, convex, becoming nearly plane, hygrophanous, pale 

 chestnut or reddish brown when moist, grayish-tawny or pale-ochraceous 

 and rugose on the disk when dry, the margin, when young, slightly 

 silky-fibrillose ; lamellae close, slightly emarginate, whitish, then brown ; 

 stem equal or slightly thickened at the base, hollow, white, sub-silky ; 

 spores brown, elliptical, .00035 ^o .0004 in. long, .00025 broad. 



Plant 2 to 3 inches high, pileus i to 2 inches broad, stem 2 to 3 

 lines thick. 



Decaying wood in wet places. Adirondack mountains. June. 



This species differs from A. oppendiciilatus, its nearest ally, by its 

 larger size, less rugose pileus and larger spores. Also, it is unlike that 

 species in parting with the moisture of the margin of the pileus first, 

 the disk retaining it some time, a character which is suggestive of the 

 specific name. I have not seen the plant growing in tufts. The veil is 

 whitish and very delicate, and at first conceals the lamellae from view. 

 It at length adheres in fragments to the margin of the pileus. 



