10 



Sph^rotheca Humuli (DC.) Burrill. 



On Agrimonia Eupatoria. Beaver, July, 1898; O. 1819. 



On Geranium maculatum, Wild Cranesbill. Burl., June, 1893; 

 Hinsdale, 891. 



On Rubus odoratus, Flowering Raspberry. Abundant. Burl., 

 Oct. 1890 ; C. 890. Beaver, July, 1898; O. 1820. 



Sph^erotheca Mali (Duby.) Burrill. 



On twigs of Pyrus Malus, Apple. Newfane, Oct. 1895; G. 894. 



SPH.EROTHECA MORS-UViE (Schw.) B. & C. 



On leaves and young shoots of Ribes sp., Gooseberry. Destructive. 

 Burl., June, 1897; 0.^742. 



SPHiEROTHECA PANNOSA (Wallr.) Lev. 



On Rosa humilis, Wild Rose. Burl., June, 1897; O. 896. 

 On Rosa rugosa. Charlotte, Sept. 1897; O. 897. Frequently quite 

 injurious. 



Sph^rotheca pruinosa C. & p. 



On Rhus copallina, Dwarf Sumach, infested by mites. Vernon, 

 Sept. 1895; G. 355. 



Uncinula circinata C. & p. 



On Acer rubrum. Red Maple. Abundant. Sept. 1889; C. 898. 

 Newfane, Oct. 1892; G. 899. Beaver, Sept. 1897: O. 901. 



On Acer saccharinum, Sugar Maple. Newfane, Oct. 1892; G. 902. 



On Acer spicatum, Mountain Maple. Burl., Oct. 1897 ; O. 904. 

 Beaver, Sept. 1897; O. 903. 



On Quercus alba. White Oak. Burl., Oct. 1890; C. 906. 



Uncinula Clintonii Pk. 



On Tilia Americana, Basswood. Burl., Sept. 1891; C. 907. 

 Winooski, Sept. 1897; O. 910. Newfane, Sept. 1892; G. 908 

 Beaver, Sept. 1897; O. 909. 



Uncinula flexuosa C. & P. 



On Aesculus Hippocastanum, Horse Chestnut. Burl., Oct. 1890 ; 

 J. 911. 



Uncinula macrospora Pk. 



On Ulmus Americana, Elm. Dummerston, Sept. 1895 ; G. 359. 



Uncinula negator (Schw.) Burrill. {C\ spiralis) {U. avipdopsidis.) 



On Ampelopsis quinquefolia, Virginia Creeper. Abundant. Burl., 



Aug. 1890; J. 912. Charlotte, Sept. 1897; O. 913. 



On Vitis sp.. Grape. Pittsford, Sept. 1890; J. 361. Burl., Oct. 



1890; J. 362. Newfane, Oct. 1892 ; G. 914. 



Common, but not seriously injurious to the grape in this state. 



