Murrill: Agaricaceae of Tropical North America 191 



4. Clitocybe incrustata sp. nov. 



Pileus turbinate, with conic umbo, solitary, 2 cm. broad, nearly 

 1 cm. high ; surface smooth, glabrous, dry, pallid with a rosy tint, 

 light-bay on the umbo, becoming incrusted on drying with a white, 

 powdery substance readily soluble in water ; margin thin, straight, 

 concolorous ; lamellae decurrent, few in number, dull-white ; spores 

 ovoid, smooth, hyaline, 8-10 X 5~7 p', stipe curved, cylindric, sub- 

 equal, glabrous, white, 4 cm. long, 4 mm. thick. 



Type collected in rich soil on a wet bank at Chester Vale, 

 Jamaica, 3,000 ft. elevation, December 23, 1908, W. A. & Edna 

 L. Murrill 298. The powdery substance covers about one third 

 of the surface and is distributed in radiating patches or streaks. 



5. Clitocybe testaceoflava sp. nov. 



Pileus obconic in outline, deeply umbilicate, irregularly oval in 

 cross section, solitary, 3-5 cm. broad; surface dry, distinctly 

 tomentose, dilute-testaceous, margin irregularly undulate, in- 

 curved, concolorous ; lamellae decurrent, rather distant, strami- 

 neous, edges undulate ; spores ellipsoid, smooth, slightly yellowish, 

 .4-5X3/^; stipe cylindric, subequal, curved, slightly paler than 

 the surface of the pileus, white near the base, 3-4 cm. long, 3 mm. 

 thick. 



Type collected under low bushes on a bank at Cinchona, Jamaica, 

 5,000 ft. elevation, December 25-January 8, 1908-9, W. A. & 

 Edna L. Murrill 543. 



6. Clitocybe mexicana sp. nov. 



Pileus convex to depressed, irregularly lobed, gregarious, scarcely 

 cespitose, 7 cm. broad ; surface smooth, glabrous, nearly white, 

 with an avellaneous-isabelline tint, margin striate, involute when 

 young ; context 1 cm. thick at the center, milk-white, sweet, odor 

 none when fresh, but strong and not unpleasant on drying ; lamellae 

 decurrent, close, rather narrow, tapering at each end, pale watery- 

 white ; spores fusiform, smooth, hyaline, 7 fx long ; stipe enlarging 

 slightly above, dealbate, glabrous, finely tomentose near the base, 

 hollow, white inside, with a tough rind, 7 cm. long, nearly 2 cm. 

 thick. 



Type collected on the ground among humus in a moist virgin 

 forest near Jalapa, Mexico, 5,000 ft. elevation, December 12-20, 

 1909, W . A. & Edna L. Murrill 137. 



