Murrill: Agaricaceae of Tropical North America 69 



few species. The two given below from tropical America are 

 taken from the studies of Fries based on unusually poor colored 

 drawings by Oersted. I have been unable to find any specimens. 

 It is just possible that Oersted's specimens really belonged to 

 Agaricus and that the veil had been lost. 



Pileus 5 cm. broad, white with white scales i. P. hololepis. 



Pileus 10 cm. broad, white with black scales 2. P. tricholepis. 



I. Pilosace hololepis (Fries) Sacc. Syll. Fung. 5: 1011. 1887 

 Agaricus hololepis Fries, Nova Acta Soc. Sci. Upsal. III. 1 : 25. 

 • 1851. 



Known only from specimens collected on the ground in Costa 

 Rica by Oersted. 



2. Pilosace tricholepis (Fries) Sacc. Syll. Fung. 5: 1010. 



1887 



Agaricus tricholepis Fries, Nova Acta Soc. Sci. Upsal. III. 1 : 

 25. 1851. 



Described from specimens said by Fries to have been collected 

 on manured ground in the island of St. Thomas. Oersted's draw- 

 ing bears the name St. Croix. This species is very much like 

 Agaricus, but " without a trace of a veil." 



10. Gomphidius Fries, Gen. Hymen. 8. 1836 



This genus is distinguished by its glutinous veil ; decurrent, 

 waxy lamellae ; and black, elongate spores. There are very few 

 species and these occur mostly in temperate regions. The single 

 tropical species is known only from Cinchona, Jamaica, at an 

 altitude of 1,500 meters. 



1. Gomphidius jamaicensis sp. nov. 



Pileus convex, slightly umbonate, 3-5 cm. broad ; surface dark- 

 brown, blackening on drying, decorated with imbricate, glutinous 

 scales, not striate on the margin ; context mild to the taste, yellow- 

 ish, slowly changing to brownish ; lamellae decurrent, arcuate, 

 broad, subdistant, dull-pinkish-yellow to gray, blackening on dry- 



