108 THE EEPOET OF THE No. 36 



Eriophyes sp. A depression on the lower surface of the leaf, 4-12 mm. in 

 diameter and 2-5 mm. in depth. Under surface of gall is orange-yellow. Populus 

 italica. T. D. J., Guelph. 



Eriophyes sp. Margin of leaf distorted and curled. Populus tremuloides. 

 T. D. J., Guelph. 



Host — Genus Prunus. 



Eriophyes sp. Reddish, slender pouch-galls, somewhat irregular and pubes- 

 cent, }i mm. long and .5-1 mm. in diameter. Pin Cherry Pouch Gall. Prunus 

 pennsylvanica. T. D. J., Guelph. 



Eriophyes sp. Green on ros3'-red pouch-gall on the upper side of the leaf .5-6 

 cm. in length. The gall is constricted about half way to the leaf. Black Cherry 

 Pouch Gall. Prunus serrotina. T. D. J., Guelph. 



Eriophyes sp. Green or reddish pouch gall on the upper side of the leaf, 

 differing from the Black Cherry Pouch Gall in that the aperture is not funnel- 

 shaped. Choke Cherry Pouch Gall. Prunus virginiana. T. D. J., Guelph. 



Eriophyes sp. A very long, slender, pouch-gall, green or whitish on either side 

 of the leaf. Wild Plum Pouch Gall. Prunus americana. T. D, J., Guelph. 



Eriophyes phlceocoptes. A tubular growth, encircling base of buds and shoots. 

 Plum Bud Gall. Prunus domestica. T. D. J., Guelph. 



Host — Genus Pyrus. 



Apple, Crab Apple. Pear and Chokecherry. 



Eriophyes sp. Dimple galls, with the concavity on the upper surface of the 

 leaf. Internal surface corrugated. Apple Dimple Gall. Pyrus malus. T. D. J., 

 Guelph. 



Eriophyes pyri. Capsule Galls on the upper side of the leaf. Apple and Pear 

 " Leaf-blister " Gall. P3^rus malus, P. coronaria and P. communis. T. D. J., 

 Guelph. 



Eriophyes sp. Capsule Galls, very small. When mature, brown "in color. 

 Chokecherry Speck Gall. Pyrus arbutifolia. T. D. J., Guelph. 



Host — Sumac. 



Eriophyes sp. The leaf margin rolled tightly upward and inward on both 

 sides. Sumac Leaf-margin Gall. Elms typhina. T. D. J., Guelph. 



Eriophyes sp. Irregular, rounded, dimple gall, convex on the upper or under 

 side of the leaf. Green to red or purple in color; inside clothed with white tri- 

 chomes. Poison Ivy Dimple Gall. Ehus radicans. T. D. J., Guelph. 



Host — Willow. 



Eriophyes sp. A pale green or purple capsule gall, projecting either above 

 or below the leaf, or both ; I3/2 to 2 mm. in diameter. Salix cordata. T. D, J.,. 

 Guelph. 



Eriophyes sp. Small, irregular, serrate and roughened pocket-galls or semi- 

 capsules, green or red, strongly pilose above and thickly pubescent beneath. Usually 

 on the upper side of the leaf. Salix discolor. T. D. J., Guelph. 



