112 
Journal of Mycology 
[Vol. 8 
diameter. Trama of gills thin, middle layer of parallel cells, and 
from these the branches diverge as they descend in the trama. 
Trama of cap, inner portion of large cells, surface of minute 
slender threads. Stems cylindrical, slightly tapering upward, 
white, minutely floccose mealy scales, hollow, abruptly enlarged 
below into a bulb. Volva ocreate, the limb narrow as in A. pan- 
therina, sometimes very slight, the stem also sometimes with 
floccose patches of the upper part of the volva in irregular con¬ 
centric rings on the lower part of the stem, the upper part of 
the volva forming floccose patches on the pileus. 
This species differs from A. nivalis Grev., in the ocreate 
volva, that of A. nivalis Grev. being vaginate. A. nivalis of Peck, 
426. Rept. N. Y. State Mu., p. 48, is probably identical. Ground 
in woods, Ithaca, N. Y. C. U. herb. No. 6097, Cascadilla woods, 
Miss Fisher, July 9, 1901; No. 9757, west shore Cayuga Lake, 
July 14, 1902, Miss A. T. Young; No. 9822, Beebe Lake woods, 
July 12, 1902, IT. H. Whetzel. 
Boletus chamaeleontinus Atkinson n. sp. — Plants 9-11 
cm. high, pileus 8-10 cm. broad, stem 2 cm. thick. Pileus con¬ 
vex, thick, flesh 2 cm. thick at the center, drab to hair brown, 
subtomentose and v/ith minute appressed scales, later rimose 
areolate something like B. scaber, but the chinks not so deep; 
flesh white tinged with yellow, changing first to reddish, then to 
blue, the red appearing first in the upper half, later spotted red 
and blue. Tubes convex, depressed around the stem, first yellow¬ 
ish, then reddish, in age the mouths tinged with red; tubes small, 
mouths round or uneven, changing to blue where bruised. 
Spores olive yellow under the microscope, elliptical to oblong, 
smooth, 12-15 x 4-5 ju . Stem reddish all over or only at top and 
bottom, reticulate or dotted as in B. lurid us , even or slightly en¬ 
larged below; flesh yellow, deep red just under the surface, cen¬ 
ter yellow changing to blue. Ground woods, Ithaca, N. Y. C. 
U. herb. No. 9842, July 19, 1902, and other dates. 
Boletus umbrosus Atkinson n. sp. — Plants 8-10 cm. high, 
pileus 5-9 cm. broad, stems 1.5-2 cm. thick. Pileus convex then 
expanded, fleshy, subtomentose and in age cracking into very fine 
areoles somewhat as in B. subtomentosus ; flesh whitish very 
slowly changing to flesh color then brown; pileus mummy brown 
to walnut brown. Tubes convex, at first white, then becoming 
pale brown, in age deeper brown, when bruised becoming dark 
brown. Stem same color as the pileus but paler, broadly and 
irregularly furrowed or rugose longitudinally, with very minute 
dark points seen under the lens. Base of stem tapering into a 
short root. West shore Cayuga Lake, July 29, 1902, C. H. Kauff¬ 
man, C. U. herb. No. 13067. 
Collybia rugosoceps Atkinson n. sp.— Plant 8 cm. high, 
pileus 5 cm. broad, stem 1.5 cm. thick. Pileus somewhat cam- 
