94 Wisconsin Academy of Sciences , Arts, and Letters. 
573. Plasmopara ribicola, Schroeter. 
On Bibes rubrum, L., var. subglandulosum. 
Maxim. Bibes prostratum , L’Her. and Bibes oxy- 
acanthoides, L. In alder thickets along creeks. 
Vilas county. Sometimes abundant. 
574. Podosphaera leucotricha, (E. & E.) Salmon. 
(Sphaerotheca mail, Burrill.) I have seen no 
specimens of this hut it is credited to Wisconsin 
in Salmon’s Monograph of the Erysiphaceae. Its 
host is the apple, Pyrus Mains, L. (cult.) 
575. Dimerosporium conglobatum (B. & 0.), EL & E. 
On Arctostaphylos Uva-ursi, Spreng. Collected 
in small quantity near Three Lakes on the lower 
surface of spots hearing an immature Phyllos- 
ticta (?) 
576. Venturia dickiel, (B. & Br.) Ces. & Be LNot. 
On Linnaea borealis , Gron. Pelican Lake. 
577. Daldinia vernicosa, (Schw.) Ces. & De ISTot. 
On trunk of living Carpinus Caroliniana, Walt 
Somers. 
578. Pseudopeziza singularia^ Peck in litt. (Peziza singular 
ria, Peck.) 
On Banunculus Pennsylvanicus, L. Vilas 
county. 
578a. Fabraea rousseauana, Sacc. & B. 
On Caltha palustris, L. Vilas county. I am 
indebted to Dr. Ei. J. Durand of Cornell Univer¬ 
sity for the determination. 
579. Ascochyta alismatis, (Oud.) Trail. 
On Alisma Plantago , L. Bacine and Kenosha 
county. 
580. Ascochyta coronaria. Ell. & Davis, n. sp. 
Spots small, irregular, definite, subangular, 
partly limited hy the veinlets, first reddish hrown, 
then dark hrown, finally pallid, 1-3 mm. in diamen 
