Murrill: Agaricaceae of Tropical North America 65 



6. Drosophila tepeitensis sp. nov. 



Pileus convex to nearly plane, with a low umbo, solitary, 2.5 

 cm. broad; surface glabrous, hygrophanous, radiate-rugose, dull- 

 latericious, smooth and dark-t>rown on the umbo ; margin undu- 

 late, dark-fuliginous ; lamellae adnate, plane, rather distant, brown 

 to black at maturity ; spores elongate-ellipsoid, smooth, opaque, 

 castaneous-fuliginous under the microscope, 12-13X7^; stipe 

 tapering upward, smooth, nearly glabrous, hygrophanous, dull- 

 white, hollow, 8 cm. long, 5 mm. thick near the base. 



Type collected on the ground among rich humus in woods in 

 the Tepeite Valley near Cuernavaca, Mexico, 2,100 m. elevation, 

 December 28, 1909, W. A. & Edna L. Murrill 483. Another 

 specimen collected in the same locality (No. 46/) appears to be 

 the same but has a stipe that is much longer and covered with 

 dense tomentum at the much swollen base. 



7. Drosophila jalapensis sp. nov. 



Pileus convex to plane, thin, not umbonate, solitary, 4 cm. 

 broad ; surface glabrous, hygrophanous, striate, dull-avellaneous- 

 isabelline, with isabelline disk ; margin entire, concolorous ; 

 lamellae adnate, crowded, rather narrow, dark-purplish-brown at 

 maturity ; spores oblong-ellipsoid, smooth, not abruptly contracted 

 at the ends, opaque, bay under the microscope, 9X4.5^; stipe 

 long and slender, equal or slightly tapering upward, smooth, 

 glabrous, white, fragile, hollow, 14 cm. long, 4 mm. thick. 



Type collected on the ground among humus in woods at Jalapa, 

 Mexico, 1,500 m. elevation, December 12-20, 1909, W. A. & Edna 

 L. Murrill ijo. Known only from the type locality. 



8. Drosophila tenuis sp. nov. 



Pileus very thin and fragile, convex, subcespitose, 3-4 cm. 

 broad ; surface hygrophanous, subglabrous, brownish, paler when 

 dry, faintly striate; context very thin and watery; lamellae ad- 

 nexed or adnate, subcrowded, rather broad, reddish-brown at 

 maturity; spores ellipsoid, smooth, decidedly purplish-brown 

 under the microscope, 7-8 X 4~5 p ; stipe cylindric, glabrous, shin - 

 ing, white, fragile, hollow, 7-8 cm. long, 3 mm. thick ; veil not 

 evident when collected. 



Type collected on the ground in woods at the base of El 



