Plasmopara pygmaea (Ung.) Schroet. 



On Anemone nemorosa. Burl., May, 1895; J. 779. 



On Anemone Virginiana. Burl., May, 1897; O. 784. 

 Plasmopara viticola (Berk. & Curt.) Berl. & DeToni. 



On Vitis aestivalis, Summer Grape. Snake Mt., July, 1898; O. 1782. 



On Vitis Labrusca, Northern Fox Grape. Burl., July, 1897; O. 778. 



On Vitis riparia, Winter Grape. Burl., July, 1897; O. 1366. 

 Common and destructive, causing the downy mildew of grape leaves 

 and the brown rot of the fruit; apparently worse on some varieties 

 than on others. 

 Sclerospora graminicola (Sacc.) Schroet. {Peronospofa graminicola 



Sacc.) 



On Setaria viridis. Bottle-grass. Not common. Burl., July, 1898; 

 J. and O. 1818. 



CHYTRIDIE^. 



Synchytrium decipiens Farl. 



On Amphicarpaea monoica. Common. Burl., June, 1897; O. 1204. 



ENTOMOPTHOREAE. 



Empusa Grylli Fresen. 



On Locusts (the insects), Melanoplus atlanis Riley. Melanoplus 

 femur-rubrum De Geer. Trimerotropus maritima Harr. 

 Abundant and destructive in some seasons. Burl., Aug, 1892; J. 398. 



ERYSIPHE.E. 



Erysiphe aggregata (Pk.) Farl. 



On fertile catkins of Alnus incana. Alder. Johnson, Aug. 1893; 

 G. 368. 



Erysiphe Cichoracearum DC. 



On Ambrosia artemisiaefolia, Ragweed. Common. Burl., Aug. 1896 ; 

 G. 787. 



On Aster paniculatus. Burl. Oct. 1897; O. 796. 



On Aster puniceus. Newfane, Sept. 1892; G. 795. 



On Chelone glabra, Turtlehead. Beaver, Sept. 1897; O. 790. 



On Cucumis sativus. Cucumber. Injurious in the greenhouse. Burl., 

 July, 1894; G. 1368. 



On Hedeoma pulegioides, American Pennyroyal. Beaver, Sept. 

 1897; 0.791. 



