256 Wisconsin Academy of Sciences, Arts , and Letters. 
Solidago ulmifolia where given as a host of Eamularia vir- 
gaureae Thnem. in the provisional list should be placed under 
Eamularia serotina E. & E. instead. Eamularia virgaureae 
Thuem. seems to vary from an Ovularia to a Cercosporella type. 
Piricularia parasitica Ell. & Evht. When well developed the 
conidia are produced into long slender tips as in Cercospora and 
may attain a length of 5Qy. 
Fusicladium radiosum (Lib.) Lind. In the provisional list 
this combination was erroneously attributed to Lindr. I have 
assumed that this is a widespread and variable species which 
includes the fungus occurring in Wisconsin the conidia of which 
vary from 15-30 x 6-11//,. Venturia tremulae Aderh. in that 
case is the ascogenous state. Peck’s description of his Clado- 
sporium letiferum (40th Report, p. 64) applies very well to the 
fungus occurring in Wisconsin and I therefore take it to be a 
synonym. Quite different material was collected on Populus 
tremuloides at Pepin in August and referred to var. microscop- 
icum (Sacc.) Allesch. The following notes were made from this 
material. 
Spots 1-4 mm. in diameter, orbicular, sordid-arid above with 
a narrow, dark, raised margin, alutaceous below also with a dark 
margin and a central paler portion on which the conidiophores 
are borne; conidia continuous, 15-18 x 4/x. This differs from the 
variety, as described, in the narrower, continuous, hypophyllous 
conidia as well as in the character of the spots. 
In the 4th supplementary list, p. 78, I gave notes of a speci¬ 
men that I had referred to Cercospora megalopotarnica Speg. To 
indicate something of the variation I add notes regarding two 
further collections: Spots suborbicular, definite, immarginate, 
blackish brown becoming paler with age and finally white in the 
center, 2-10 mm. in diameter; conidiophores tufted, septate, 
smoky brown, 55-80 x 4-5 y ; conidia slender, straight, attenuate, 
pluriseptate, 60-125 x On Bidens connata, Price County, 
Sept. 9th, 1911. 
Spots suborbicular, light brown with a purple margin and a 
white center, paler and devoid of purple below, 4-8 mm. in di¬ 
ameter; conidiophores amphigenous, fasciculate, varying from 
subhyaline to brown, straight, flexuose or bent, continuous, en¬ 
tire or toothed, 15-45 x Sy ; conidia hyaline, straight, attenuate, 
