204 



N. vitinea Felt — On petioles of grape leaves. 



Neuroterus batatus Fitch — Oak Potato Gall on twigs of Quercus alba. 



N. majalis Bass. — On leaves of Quercus alba. 



Obolodiplosis Robiniae Hald. — On leaves of Robinia Pseudo- Acacia. 



Oligotrophus salicifoUus Felt — On leaves of Salix discolor. 



Pachypsylla Celtidis-gemma Riley — Hackberry Nodule Gall. 



P. Celtidis-mamma Riley — Hackberry Nipple Gall. 



Pemphigus Populicaulis Fitch — Poplar Stem Gall. 



P. Rhois Fitch — Sumac Tomato Gall on leaves of Rhus glabra. 



Phylloxera Caryaecaulis Fitch — Hickory Louse Gall. 



P. Caryae-globuli Walsh 



P. vastatrix Planch. — Grape Phylloxera. 



P. vitifoliae Fitch 



Rhabdophaga Salicifolia Felt — On leaves of Spirea latifolia. 



Rhodites bicolor Harr. — Spiny Rose Gall. 



R. dichlocerus Harr. — Long Rose Gall. 



R. globosus Beutm. — Globular Rose Gall. 



R. ignota O. S. — Mealy Rose Gall. 



R. verna O. S. — Knotty Rose Gall. 



Rhopalomyia anthophila O. S. — On leaves of Solidago. 



R. capitata Felt — On stems of Solidago. 



R. lateriflora Felt — On stems of Aster ericoides. 



R. racemicola O. S. — On flowers of Solidago rugosa. 



Sackenomyia viburnifolia Felt — On leaves of Viburnum dentatum. 



Solenozopheria Vaccinii Ashm. — Huckleberry Gall on stems of Gaylussacia baccata. 



Trypeta polita Lw. — Goldenrod Gall. 



Thallophyta 

 myxothallophyta 



Myxomycetes 

 Arcyria cinerea (Bull.) Pers. — On rotten wood of oak. 

 A. denudata (L.) Sheldon — On hickory and cherry. 

 Ceratiomyxa fruticulosa (Muell.) Macbr. — On rotten wood. 

 Fuligo ovala (Schaeff.) Macbr. — On old oak trunks. 

 Hemitrichia serpula (Scop.) Rost. — On old hickory wood. 

 H. vesparium (Batsch) Macbr. — On old hickory wood. 

 Lycogala epidendrum (Buxb.) Fr. — On pine stumps, hickory and oak. 

 Plasmodiophora Brassicae Woron. — On roots of Brassica oleracea; determined at 



Bureau of Plant Industry, Washington. 

 Reticularia Lycoperdon Bull. — On Sassafras Sassafras. 

 Stemonites Smithii Macbr. — On old logs. 

 Trichia favoginea (Batsch) Pers. — On old wood of Robinia Pseudo-Acacia. 



EUTHALLOPHYTA 



EUPHYCEAE* 



Agardhiella tenera (Ag.) J. Ag. 

 Ahnfeltia plicata (Huds.) Fr. 



* The marine algae were mostly determined by Dr. M. A. Howe and are pre- 

 served in the Herbarium of the New York Botanical Garden. 



