20 



THE SAN JOSE SCALE. 



Aspidiotu.'< perniciosus Comst. 



(Food plants: Almond, apple, apricot, birch, black walnut, black currant, catalpa, 

 chestnut, crab-apple, crab-grass, cherry, grape, hickory, oak, peach, pear, persim- 

 mon, plum, poplar, prune. Rocky Mountain cherry, rose, silver maple, willow, and 

 many other plants. ) 



For bibliography and food plants see Fernald, Cat. Coccid;e of World, Bui. 88, 

 Mass. Agr. Coll., pp. 271-275, 1903; Howard and Marlatt, Bui. 3, n. s., Div. Ent., 

 U. S. Dept. Agric, 1896, 80 pp. 



Exhibit: Infested twig. 



THE CHERRY LEAF-BEETLE. 



GaleruceUa cavicolUs Lee. 



For general article and distribution see Chittenden, Bui. 19, n. s., Div. Ent., U. S. 

 Dept. Agric, pp. 90-93, 1899. 

 Exhibit: Adult. 



THE CHERRY-FRUIT MAGGOT. 



RJiagoli'fis cingulata Loew. 



For detaileil account see Slingerland, Bui. 172, Cornell Univ. Agr. Exp. Sta., 41 

 pp., 6 figs., 1899; Chittenden, Bui. 44, Div. Ent., U. S. Dept. Agric, pp. 70-75, 1904. 

 Exhibit: Adult. 



INSECTS INJURIOUS TO PEAR. 



(Many of the insects injuring the apple will ln' found attacking the pear.) 

 THE FRUIT-TREE BARK-BEETLE. 



Scolytus rugulosns Ratz. 



For general account see Chittenden, Cir. 29, Div. Ent., U. S. Dept. Agric, 1898. 

 Exhibit: Adult, work, and figure. 



PEAR-BLIGHT BEETLE; SHOT-BORER. 



Xijleborus pyri Peck. 

 (Formerly X. dispar.) 



For general account see Hubbard, Bui. 7, n. s., Div. Ent., U. S. Dept. .-gric, pp. 

 22-23, 1897. 



Exhibit: Adult, work, and figure. 



THE PEAR BLISTER MITE. 



Eriophyes 2)yri Pagenst. 



For detailed account see Slingerland, Bui. 61, Cornell Univ. Agr. Exp. Sta., p- 

 317-S28, figs., 1893. 



Exhibit: Work and figure. 



THE PEAR PSYLLA. 



P.tylla pyri Linn. 



(Formerly P. pyrlcola.) 



For general accounts see Slingerland, Bui. 44, Cornell Univ. Agr. Sta., 1892; Mar- 

 latt, Cir. 7, Div. Ent., U. S. Dept. Agric, 1895. 

 Exhibit: Adult and figure. 



THE PEAR SLUG. 



Eriocampokles limacma Retz. 



( Formerly Erwrampa rerdsl. ) 



For general account see Marlatt, Cir. 28, Div. Ent., U. S. Dept. Agric, 1897. 



Exhibit; Adult, work, and figure. 



