192 Natural History Bulletin. 



Height 2'-3'. Pileusi'-3'. Spores elliptic, .oofix -005 mm. 



Very common on lawns and in cultivated lands all summer, 

 especially after rains. Older specimens are paler, almost 

 white, and have the pileus completely explanate and split 

 about the margin. Not edible. 



SERIES V. COPRINARII.— The Black-Spored Agarics. 



The spores in this series are jet black, and the species differ 

 from those of the following genus, Cofrinus^ only in that they 

 are not deliquescent.' 



SiLbgemis Panceolus. 

 Pileus somewhat fleshy, not striate, the margin exceeding 

 the lamellae. 



43. Agaricus campanulatus, Linn. 



Pileus somewhat fleshy, campanulate, dry, even and sub- 

 shining, yellowish; lamellae adnate, seceding, gray becoming 

 black; stipe straight, slender, reddish, hollow, striate and 

 dark-pulverulent at the apex. 



Height 4'-6'. Pileus >^'-i>^'. Spores eUiptic, .oi2X 

 .015 mm. 



Very common all summer on horse dung and richly manured 

 land; remarkable for the rapidity of its development. 



44. x\garicus fimicola, Fr. 



Pileus somewhat fleshy, sordid whitish, campanulate-con- 

 vex, smooth, marked with a narrow fuscous zone around the 

 margin; lamellae adnate, broad, gray mottled with black; 

 stipe frail, equal, pallid, whitish at the apex. 



Height 2 '-4'. Pileus i'-2'. Spores elliptic, .oiox.015 mm. 



Very common in similar places and with the preceding. 

 Easily known by the marginal band, which is very noticeable 

 when the plant is moist. 



I By Saccardo all the black-spored genera are grouped together in a single 

 section, i. e., the Pratelli^ the Coprifiarii and the Copritii, as here described, are 

 united under the title MelanosporcB. The arrangement of Fries is, nevertheless, 

 a convenient one, and cannot in any systematic arrangement well be ignored. 

 The sub-divisions instituted at the outset are therefore still adhered to. 



