=G. vittæfor´mis= Fr.—_vitta_, a chaplet; _forma_, form. =Pileus= ½-1 in. broad, _date-brown_ when moist, membranaceous, conical then hemispherical, obtuse, _even at the disk_, striate toward the margin, smooth. =Stem= 1½-3 in. long, ½-1 line thick, tubular, equal, _somewhat straight_, but not tense and straight, smooth or sometimes pubescent, slightly striate under a lens, _opaque, rust-color_. =Veil= scarcely conspicuous. =Gills= adnate, broader at the middle, in the form of a segment when larger, somewhat ascending, somewhat distant, at first _watery-cinnamon_, at length rust-color. _Fries._ =Spores= elliptical, 12×6µ _Massee_. Haddonfield, N.J.; Mt. Gretna, Pa. On pastures, lawns, etc. June to September. _McIlvaine._ Not previously reported. Though small it makes up in quantity when found. The stems are not as tender as the caps. Quality good. [Illustration] =BOLBITIUS= Fr. _Gr_—cow’s dung. =Pileus= membranaceous. =Gills= adnexed or free, membranaceous, soft, salmon-color or rusty, dissolving (not dripping as in Coprinus), powdered with the rusty spores. =Stem= central; universal veil absent, partial veil often obsolete. Very delicate and fragile, remarkable among the Ochrosporæ for the gills dissolving into mucus, and in this respect analogous with Coprinus among the Melanosporæ, and Hiatula amongst the Leucosporæ. Growing on dung or amongst grass where dung abounds. A small but very natural genus, with the vegetative portion like Coprinus and the fructification resembling Cortinarius, hence occupying an intermediate position between these two genera. _Fries._ =B. Bol´toni= Fr.—after Bolton. =Pileus= rather fleshy, viscid, at first even, then with the membranaceous margin sulcate, disk darker, subdepressed. =Stem= attenuated, yellowish, at first floccose from the remains of the fugacious veil. =Gills= subadnate, yellow then livid-brown. _Fries._ Haddonfield, N.J., cespitose among manure on sawdust. Of small substance but good consistency and flavor. (Plate LXXX.) [Illustration: BOLBITIUS FRAGILIS. Two-thirds natural size. ] =B. fra´gilis= Fr. =Pileus= 2 in. broad, _light yellow_, then becoming pale, somewhat membranaceous, almost pellucid, conical then expanded, somewhat umbonate, smooth, viscous, _striate round the margin_ (which is often crenulated). =Stem= 3 in. long, 1 line or little more thick, fistulose, attenuated upward, _naked, smooth_ (and without a manifest veil), yellow. =Gills= attenuato-adnexed, almost free, ventricose, _yellow then pale cinnamon_. =Spores= rust-colored. _Fries._ Thinner than B. Boltoni, etc., very fragile, rapidly withering. On dung. Common. June to October. _Stevenson._ =Spores= subspheroid-ellipsoid, elliptical, 7×3–5µ _Massee_. West Virginia; Pennsylvania. June to frost. On rich grass and dung.