1908 ENTOMOLOGICAL SOCIETY. ' 89 



shoots. Black Cherry Bud Gall — CecidoTnyia serotirum. Prunus Serotina. 

 A malformation of the fruit. The pit or stone is absent and the fruit 

 is enlarged, forming a thick walled pouch about 1 cm. in length bj 5 mm. 

 in width. Chokecherry Pocket Gall — Cecidomyia virginiana. Prunus vir- 

 giniana. 



Affecting Genus Pyrus. 



Apple, Crab Apple, Pear and Chokeberry. 



Dimple galls, with the concavity on the upper surface of the leaf. 

 Internal surface corrugated. Apple Dimple Gall — Eriophyes sp. Pyrus 

 mains. 



Capsule Galls on the upper side of the leaf. Apple and Pear "Leaf- 

 blister" Gall — Eriophyes pyri — Plate K., fig. 6. Pyrus mains, P. cor- 

 onaria and P. communis. 



Knot-like swellings on the stems. Woolly Aphis Gall — Schizoneura 

 langigeria. Pyrus mains. 



Capsule Galls, very small. "When mature, brown in color. Choke- 

 berry Speck Gall — Eriophyes sp. Pyrus arbutefolia. 



Affecting Rose. 



A. — Gcdls on the leaves. 



Small, thin walled, spherical galls, red or green in colour, and covered 

 with short spines. About .75 cm. in diameter and monothalamous. Spiny 

 Ball Gall — Rhodites riehulosus. — Plate F., fig. 2. Rosa Carolina. 



Small, circular galls about 3 mm. in diameter on the upper surface 

 of the leaf. Pale green in colour and characterized by the presence of a 

 little nipple in the centre of the gall. Nipple Gall — Rhodites lenticularis 

 (Bass.) Rosa Carolina. 



Round, woody, globular or irregularly shaped galls, covered with a 

 white mealy substance. Mealy Rose Gall — Rhodites ignotus (O.S.) — Rosa 

 sp. 



B. — Galls oil, the stem. 



Smooth, corky enlargement rising at each end abruptly from the branch ; 

 2-2.5 cm. in length and 1-1.5 cm. in width. Globular Rose Gall — Rhodites 

 globulus. — Plate F., fig. 4. Rosa Carolina. 



Hard, small cells, clustered around a branch or twig. The cells are 

 covered with a dense, thick mass of green filaments which grow from them ; 

 monothalamous and from 1.5-2 cm. in diameter. Mossy Rose Gall — Rhodi- 

 tes rosae — Plate E., fig. 4. Rose Carolina. 



Large, round or oblong galls from 1 to 2 inches in length; reddish 

 brown and covered with stout spines or prickles. Spiny Rose Gall — Rho- 

 dites multispinosus (Gill.) — Plate B., fig. 3. Rosa sp. 



Spherical, covered with many prickly spines which vary in length, and 

 are sometimes larger than the diameter of the gall. Internally it is hollow 

 with the wall about 1 to 2mm. thick. Yellowish green, sometimes tinged 

 with red. Soft and fleshy in summer, woody and brown in winter. It is 

 found singly or in clusters of from two to ten or more, upon twigs of differ- 

 ent kinds of wild roses. (Beutm.) — Rhodites hicolor (Harr.). Rosa sp. 



Elongated swelling of the branch, gradually tapering at both ends. 

 Smooth or densely covered with short spines. About 2 inches long and 

 polythalamous. Long Rose Gall — Rhodites dichlocerous (Harr.). Rosa 

 sp. 



