1908 ENTOMOLOGICAL SOCIEIY. 77 



A deformation of the terminal buds, their development arrested, pro- 

 ducing a mass of small twisted leaf ends. Eriophyes sp. — Fraxinus ameri- 

 cana. 



Leaves dwarfed and distorted in a bundle. Resembles somewhat Ceci- 

 domyia solidaginis. Ash Bunch Gall — Eriophyes sp. Plate L., fig. 2. 

 Fraxinus americana. 



Small, irregular, more or less spherical capsule gall protruding on both 

 sides of leaf. Galls hairy — Eriophyes sp. Fraxinus pubescens. 



Affecting Barley. 



A small gall forming a woody growth which fills up the cavity of the 

 stalk and causes the joints to swell. Barley Joint- Worm Gall — Isosom,a 

 hordei (Harris). Hordeum vulgare. 



Affecting Bass wood. 



A. — Galls on the leaves. 



Balloon-shaped frails on the upper surface of the leaf Apex of gall 

 usually serrated. Basswood Balloon Gall — Eriophyes abnormis Garman — 

 Plate I., fig. 6. Tilia americana. 



Irregular, circular, dark reddish-brown spots about 4-5 mm. in diameter, 

 having in their centre very characteristic tufts of whitish hairs. Basswood 

 Tufted Gall. Tilia americana. 



A white erineum or shallow dimple on underside of leaf, much like the 

 Erineum on Acer negundo. Eriophyes sp. — Plate M., fig. 4. Tilia europea. 



Small swellings about 3 mm. in diameter, protruding from both sides 

 of the leaf. Red above and green below. Basswood Wart Gall — C ecidomyia 

 verrucicola, O.S. Tilia americana. 



B. — Galls on Stem. 



Oval swellings of the cortex about 1 cm. long. Texture pith-like, sur- 

 face smooth and of the same color and appearance as the bark. Basswood 

 Egg Gall. Tilia americana. 



' Affecting Bearbeery. 



Red galls about 10 mm. long and 4. mm. broad, upon the leaves. Result- 

 ing from the folding over of the edge of the leaf or sometimes both edges, 

 forming a pocket. Bearberry Leaf Gall — Pemphigus Coweni (Ckl.) — Arcto- 

 staphylos uva-ursi. 



Affecting Beech. 



A frosty, white erineum in large patches on the under side of the leaf. 

 Trichomes spherically capitate. Eriophyes sp. — Plate H., fig. 4. Fagug 

 americana. 



Affecting Blue Beech. 



Fold of the leaf along the veins forming a long hollow tube. Yein Gall 

 of Blue Beech — Cecidornyia pudihunda — O.S. Plate E., fig. 6. Carpinus 

 caroliniana. 



Affecting Birch. 



A bud deformation, crowded and irregular, often in bunches of large 

 size. Birch Bud Gall — Eriophyes sp. — Plate G., fig. 6. Betula lutea. 



A rosy pink erineum in large patches on the upper side of the leaf. 

 Eriophyes sp. — Betula lenta. 



