Murrill: Agaricaceae of Tropical North America 27 



isabelline on the disk ; margin straight, entire, concolorous ; lamel- 

 lae adnate, crowded, rather broad, grayish- white at. first, becom- 

 ing black with age; spores ellipsoid, smooth, opaque, dark-pur- 

 plish-brown under the microscope, black in mass, 12 X 7^; stipe 

 rather fragile, filiform, smooth, snow-white, mycelioid at the base, 

 4 cm. long, 1 mm. thick. 



Type collected in humus in a moist, virgin forest at Motzorongo, 

 near Cordoba, Mexico, January 15, 1910, W. A. & Edna L. Mur- 

 rill 1066 (herb. N. Y. Bot. Gard.). 



4. Psathyrella Earlei sp. nov. 



Pileus membranous, not deliquescent, convex, obtuse, cespi- 

 tose, 1-2 cm. broad; surface hygrophanous, glabrous, crustose- 

 rugose, grayish-brown, somewhat darker on the disk, paler when 

 dry ; margin concolorous, striate, not splitting on the backs of 

 the lamellae, which are adnate, crowded, rather broad, avellaneous 

 to blackish ; spores broadly ellipsoid, smooth, opaque, dark-brown 

 under the microscope, black in mass, 10-12 X 8-9 ft ; stipe slender, 

 equal, tubular, glabrous, minutely pubescent at the apex, white 

 with a brownish tint, cartilaginous, 5-7 cm. long, 1— 1.5 mm. thick. 



Type collected on buried wood in a banana field at Santiago de 

 las Vegas, Cuba, June 18, 1904, F. S. Earle 96 (herb. N. Y. Bot. 

 Gard.). 



5. Psathyrella cubensis sp. nov. 



Pileus thin, campanulate to expanded, sometimes upturned at 

 the margin with age, gregarious, 1-1.5 cm. broad; surface glab- 

 rous, hygrophanous, sometimes rugose, reddish-brown to pale- 

 rosy-isabelline ; margin concolorous, striate, becoming irregular or 

 fluted; lamellae adnate or adnexed, broad, ventricose, rather 

 crowded, at first pallid, becorning dark-purplish-brown or almost 

 black ; spores very broadly ellipsoid, opaque, uniguttulate, chest- 

 nut-colored under the microscope, black in mass, 9-12X7-8/*.; 

 stipe filiform, glabrous, smooth, white and farinaceous at the 

 apex, reddish below, 3-5 cm. long, 1 mm. thick. 



Type collected in clay soil in a banana field at Santiago de las 

 Vegas, Cuba, June 18, 1904, F. 5\ Earle 98 (herb. N. Y. Bot. 

 Gard.). Also collected by Van Herman in the same locality, Sep- 

 tember 8, 1904, F. S. Earle 172. 



