418 Wisconsin Academy of Sciences, Arts, and Letters. 
Salmon in his studies of the Erysiphaceae encountered speci¬ 
mens from South Dakota and Wyoming on Yicia for the recep¬ 
tion of which he proposed the variety ludens of Microsphaera alni 
(Wallr.) Wint. Material of similar character has been collected 
at Nekoosa on Desmodium paniculatum (Fig. 1) and referred to 
this variety. Recurved appendage tips are not abundant. 
Fig. 1. Outlines of selected appendage tips of Microsphaera alni ludens 
from leaf of Desmodium paniculatum. Camera lucida drawing by Paul 
A. Harvey. Magnified about 265 diameters. 
Erysiphe graminis DC. Conidia on Dactylis glomerata. Fish 
Creek. 
Phyllachora was abundant on Andropogon furcatus at Chetek 
in September, 1918, but immature. Phyllachora on Melica striata 
was collected at Mosinee in September, 1919, also immature, but 
the characters of the ascomata are not those of Ph. melicicola Speg. 
A collection on Oakesia sessilifolia referred to Phyllosticta 
cruenta (Fr.) Kickx bears sporules 15-20x3%-6 /a. 
Ascochyta clematidina Thuem. var. thalictri Davis. On Tha- 
lictrum dasycarpum Saxon. In this collection the sporules are 10— 
17 x 3-4/i, thus approaching the type on Clematis. In the refer¬ 
ence to this variety in “Notes” Y the page number should be 557 
instead 757 as printed. 
Ascochyta pisi Lib. On leaves of Yicia caroliniana. Fish 
Creek. In this collection the pycnidia range up to 175/a in diame¬ 
ter with tenuous, transparent walls, the ostiole hypophyllous, the 
sporules 17-30 (mostly about 23) x 3-3*4 /a. In specimens on 
Yicia americana the ostiole is epiphyllous. 
