78 



Mycologia 



io. Agaricus praemagnus sp. nov. 



Pileus large, thick and fleshy, convex to expanded, gregarious 

 to cespitose, 12-18 cm. broad; surface avellaneous to dirty-white 

 or yellowish, with minute, appressed, avellaneous or brownish 

 scales, the disk concolorous or very slightly darker ; margin thin, 

 not striate, pallid, exceeding the lamellae; context white, with 

 pleasant, nutty flavor, and sometimes a faint odor of prussic acid ; 

 lamellae free, densely crowded, rather narrow, plane, pure-white, 

 becoming dirty-pink and at length coppery-brown to black ; spores 

 rather broadly ellipsoid, rounded at both ends, smooth, often 

 obliquely apiculate at the base, decidedly purplish-brown under 

 the microscope, opaque, rather variable in size, 6-J X 3-5-4-5 5 

 stipe subcylindric, very slightly enlarged at the base, dirty-white, 

 staining when handled, somewhat pruinose, fistulose, 10 cm. long, 

 2 cm. thick ; annulus very large, membranous, tough, persistent, 

 white above, brownish-floccose below, distant 1-2 cm. from the 

 apex of the stipe. 



Type collected in grass near manure heaps at Santiago de las 

 Vegas, Cuba, May 13 and 15, 1904, F. S. Earle 18. Also collected 

 on a manure pile at the edge of a lawn at Chester Vale, Jamaica, 

 900 m. elevation, December 21-24, 1908, W. A. & Edna L. 

 Murrill 265; and at Knutsford Park, Kingston, Jamaica, January 

 9, 1909, W. A. Murrill 827. 



11. Agaricus jejunus Fries, Nova Acta Soc. Sci. Upsal. III. 



1 : 24. 185 1 



Described and known only from specimens collected in the 

 Antilles, said to be growing with A. campester and A. pratensis. 

 Pileus gibbous, 6 cm. or more broad ; surface reddish, appressed- 

 pilose-squamulose, smooth and umbrinous on the disk; lamellae 

 very much crowded ; stipe enlarged at the (base, tapering upward, 

 white, 7.5 cm. long; annulus lacerate, evanescent. 



12. Agaricus herradurensis sp. nov. 



Pileus thin, cylindric to broadly convex, discoid at the center, 

 solitary, 3 cm. broad; surface dry, reddish-brown, the pellicle 

 rupturing and forming upturned floccose squamules, the disk 

 dark-brown ; margin pallid, entire, not striate ; lamellae free, 

 crowded, rather broad, dark-reddish-brown at maturity; spores 



