=Edge= of gills entire. =Panus.= 134 =19=--=Gills= dichotomous. =Xerotus.= =Gills= fold-like, irregular. =Trogia.= 137 There are only a few rare species of Hiatula, Nyctalis, Heliomyces and Xerotus in the United States. None are here described. THE OCHRE-SPORED AGARICS. (The spores are yellowish brown or rusty brown.) =Gills= not separating readily from 1 =Gills= sometimes separating readily from the pileus, forked or anastomosing at the base, or connected with vein-like reticulations. =Paxillus.= 165 =1=--=Universal veil= not arachnoid (i. e., not cobwebby). 2 =Universal veil= arachnoid, distinct from the cuticle of the pileus, gills powdery from the spores. =Cortinarius.= 161 =2=--=Stipe= central. 3 =Stipe= eccentric or none. =Crepidotus.= 159 =3=--=Volva= or annulus present on stipe. 4 =Volva= and annulus wanting. 5 =4=--=Stipe= with an annulus. =Pholiota.= 150 =Stipe= with a volva. =Locellina= (not reported in U. S.). =5=--=Gills= free from the stem. =Pluteolus.= =Gills= attached. 6 =6=--=Gills= not dissolving nor becoming powdery. 7 =Gills= dissolving into a gelatinous or powdery condition, not diffluent as in Coprinus. =Bolbitius.= 163 =7=--=Stipe= fleshy. 8 =Stipe= cartilaginous or sub-cartilaginous. 10 =8=--=Gills= somewhat sinuate. 9 =Gills= adnate or decurrent. =Flammula.= 156 =9=--=Cuticle= of the pileus silky or bearing fibrils. =Inocybe.= 158 =Cuticle= of pileus smooth, viscid. =Hebeloma.= 157 =10=--=Gills= decurrent. =Tubaria.= 159 =Gills= not decurrent. 11 =11=--=Margin= of pileus inflexed. =Naucoria.= 153 =Margin= of pileus straight, from the first. =Galera.= 155 No species of Pluteolus are here described. THE ROSY-SPORED AGARICS. (The spores are rose color, pink, flesh or salmon color.) =Stipe= central. 1 =Stipe= eccentric or none and pileus lateral. =Claudopus.= 149 =1=--=Pileus= easily separating from the stipe, gills free. 2