92 
F. 015 are doubtful. There appear to be two species mixed, and neither 
of them in any of the copies now accessible to us are P. igniarius. In 
some of the copies certainly this number is P. rimosus , Berk., which is 
yellower and in the young stage of growth has thepileus subtomentose- 
velutinous, with the hymenium unarmed (as far as we have yet seen) 
and the spores ferruginous. 
Mucronoporus nigricans, Fr. Finland specimens from Karsten 
agree perfectly with specimens collected by Miss Minns on birch trees 
in New Hampshire. Spines abundant, 12-20 by 5-6//. 
Mucronoporus salicinus, (Pers.). Specimens from Karsten Fin¬ 
land. Spines tolerably abundant, 15-25 by 5-6//. Specimens collected 
by Miss Minns in the Lake Superior region agree perfectly with the 
Finland specimens. Both this and the preceding (M. nigricans) have 
the pileus smooth, zoned, and black, but M. salicinus , according to the 
description and specimens, is for the most part resupinate with only a 
narrow retlexed margin, while in the typical M. nigricans the pileus is 
dimidiate without any effused or resupinate part extending down below 
it, but in this too there are forms either entirely or partly resupinate. 
Mucronoporus conchatus, (Pers.). Specimens from Hr. C.B. Plow- 
right, England. Spines few but stout, 15-25 by 6-8//. The specimens 
in N. A. F. 918 have the pores a little smaller, the color inclining more 
to yellow and the spines rather more abundant. This species lias very 
much the same general appearance as M. salicinus but the pileus is 
tomentose and rough. 
Trametes protracta, Fr., and Fomes tenuis, Karst, (speci¬ 
mens from Karsten), also have the hymenium thickly studded with long 
(30-40//) spines and will be included in Mucronoporus. It may be 
noted that in all the species enumerated in this and the former paper 
the color of the hymenium is some shade of rust color or brown. We 
have not yet noticed any of the light colored species with the hymenium 
spiny. The same remark will apply to Ilymenoclicete. 
NOTES. 
By B. T. Galloway. 
ASCOSPORES OF THE BLACK-ROT FUNGUS AS AFFECTED BY COVER¬ 
ING WITH EARTH. 
As is now well known the ascospores of the fungus causing black-rot 
of grapes are formed—at least in the majority of cases—during the 
spring and early summer months in the old berries which were affected 
the previous season with the disease. On the supposition that burying 
the old berries in tlie-spring by turning them under with the plow will 
destroy the spores, many grape-growers go to considerable trouble and 
expense every year in order that this work may be done effectually. 
For the purpose of ascertaining just what effect covering berries, which 
