70 



Siphonophora rudbeckiae Fitch. Columbus, (weed.) A 



common species on Rudbeckia. 

 Aphis brassicae Linn. Common cabbage plant-louse. 



Everywhere common. 

 Aphis mali. Common apple plant-louse. 

 Aphis gossypii. "Cucumber plant-louse." Often very 



abundant and destructive. Lawrence Co., 9- 



28-'98. Destructive to strawberries on several 



premises. Bradrick ll-17-'98. On strawberry 



plants. (Webster.) 

 Myzus cerasii L. Columbus, (Weed.) On cherry 



Often very plentiful. 

 Myzus ribis L. Columbus. (Weed) 

 Myzus persicae. Common. " Peach Aphis." 

 Myzus persicae niger Sm. 8-22-'98. Waterville- 



Seriously abundant on roots of peach trees. 



(Webster.) 

 Lachnus strobi Fitch. Columbus, (Weed.) 

 Lachnus dentatus LeB. Columbus, (Weed.) 

 Lachnus pini h. Columbus, (Weed.) 

 Malanoxanthus sah'cti Harr. Columbus, (Weed.) 

 Malanoxanthus salicis hint]. Columbus, (Weed.) 

 Schizoneura imbricator Fitch. Common Beech 



blight. 

 Schizoneura lanigera Haussm. Common Apple root 



louse. Lakewood. 8-12-'96. On trunks of 



apple, especially injured parts. (C. W. M.) 



Ravenna, (F. M. W.) Wooster (C. W. M.) 

 Schizoneura americana Elm leaf gall-louse. 

 Schizoneura tesselata Fitch. Zanesville, ll-5-'96. 



Infesting " English Alder " (Webster. ) 

 Pemphigus smilacinus 0. and S. On smilax, Rocky 



Fork. 

 Pemphigus vagabundus Fh Vagabond gall. 



Columbus, Sandusky. Very plentiful at Cedar 



Point, summer of 1899. 

 Colopha ulmicola. Common Cocks comb gall on elm 



leaves. 



