758 Wisconsin Academy of Sciences, Arts, and Letters. 
683c. Ascochyta leonuri Ell. & Dearn. 
On Lycopus sinuatus Ell. Kenosha county. 
684. Cercospora avicularis Wint. 
On Polygonum aviculare L. Racine. 
On Polygonum erectum L. Adams county. 
685. Cercospora ceanothi Kell. & Swingle. 
On Ceanotlius ovatus Desf. Adams county. 
686. Cercospora circumscissa Sacc. 
On Prunus serotina Ehrh. Wind Lake. 
687. Cercospora cypripedii Ell. & Dearn. 
On Cypripediium pubescens Willd. ( ?) Waupaca. On 
Cypripedium acaute Ait. Adams county. 
688. Cercospora epigaeina sp. nov. 
On red brown areas occupying the greater part of the 
leaf; hyphal tufts hypophyllous, thickly and uni¬ 
formly effused over the affected areas; hyphae 
densely tufted from a tubercular base, brownish 
black, straight or the outer ones curved toward the 
center of the fascicle, continuous, 20—30 X 3—4 
microns; conidia hyaline straight or somewhat 
curved, tapering, pluriseptate, 60—100 X S' 
microns. 
On Epigaea repens L. Adams county, July 18, 1908. 
689. Cercospora megalopotamica Speg. 
On Bidens cernua L. Dousman. The specimens 
which I have referred to this South American 
species have the ,following characters: Spots 
definite, suborbicular, dark brown becoming arid 
and whitish in the center, concentrically wrinkled, 
paler and less definite beneath, 5—8 mm in 
diameter; hyphae amphigenous in small tufts, 
deep brown, septate, straight or somewhat flexuose ' 
and toothed 35—45 X 3—4 microns; conidia 
hyaline, often somewhat curved, tapering upward, 
pluriseptate, containing numerous conspicuous 
nuclei or globose granules, 80—165 X 5 microns. 
690. Cercospora mexispermi Ell. & Hoi. 
On Menispernum Canadense L. Racine. 
