— 360 — 
parendogli che realmente cose distinte fossero la Gr. fuliginea e il 
Coniothyrium Diplodiella e maggiore analogia esistesse invece fra il 
suo fungo e la Tudercularia acinorum da me descritta, come risuita dalla 
seguente lettera che il distinto crittogamista americano mi diresse: 
“« Washington, 17 May 1888. 
“DI CAVARA. 
“ Dear Sir 
b) 
«I desire to thank ye” for your kindness in sending me your “ In- 
torno al disseccamento dei grappoli della vite. , I have been greatly 
interested in it. Your descriptions are scientific and very clear and 
your illustrations excellent. 
“ Brown rot is undoubtedly caused by Peronospora viticola. The 
fangus does not fruit upon the berry after the latter has attained a 
certain age. In this country the loss from brown rot is considerable, but 
by no means so great as from Black rot (PRysalospora Bidwelliî). 
«I have not as yet been able to study White rot (Conziothyrium 
Diplodiella) excepting upon the berries collected in Missouri by M. 
Viala. The characters of the conceptacles, spores, etc. as I have seen 
them, are well illustrated by figs. 2, 3, 4, 5 & 6, Table IV® of your 
brochure. 
“ Coniothyrium Diplodiella is ‘certainly very distinet from Greeneria 
fuliginea, S. et V. You need not consider the question of their rela- 
tionship for a moment. Greeneria fuliginea has much in common with 
your Tubereuluria acinorum. Your figure (7, Table V®) and your de- 
scription of the Tubercularia agree in many points with our Greeneria. 
I will send you a few specimens of berries affected with G. fuliginea 
in order that you may make comparison. 
«I shall be very much gratified to hear from you by letter, and 
to receive your publications. I shall esteem it a great favor if you 
will send me a few specimens of Briosia ampelophaga, Phoma leuticularis, 
Physalospora baccae, Tubercularia acinorum and Glaeosporium Physalo- 
sporae. 
«“ Respectfully “ F. LAmson SCRIBNER. , 
Dopo accurato esame degli esemplari inviatimi dal sig. Seribner, 
lho riscontrato nella Greeneria fuliginea alcuni caratteri, dei quali non 
è fatto parola nella descrizione data dagli autori e che inducono a mo- 
dificare il posto sistematico assegnato a questo fungo. 
