20 
THE SAN JOSE SCALE. 
Aspidiotus 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. Coccidee of World, Bul. 88, 
Mass. Agr. Coll., pp. 271-275, 1903; Howard and Marlatt, Bul. 3, n. s., Div. Ent., 
U. 8. Dept. Agric., 1896, 80 pp. 
Exuisit: Infested twig. 
THE CHERRY LEAF-BEETLE. 
Galerucella cavicollis Lee. 
For general article and distribution see Chittenden, Bul. 19, n. s., Div. Ent., U.S. 
Dept. Agric., pp. 90-93, 1899. 
Exuisir: Adult. 
THE CHERRY-FRUIT MAGGOT. 
Rhagoletis cingulata Loew. 
For detailed account see Slingerland, Bul. 172, Cornell Univ. Agr. Exp. Sta., 41 
pp., 6 figs., 1899; Chittenden, Bul. 44, Div. Ent., U.S. Dept. Agric., pp. 70-75, 1904. 
Exuisir: Adult. 
INSECTS INJURIOUS TO PEAR. 
(Many of the insects injuring the apple will be found attacking the pear. ) 
THE FRUIT-TREE BARK-BEETLE. 
Scolytus rugulosus Ratz. 
For general account see Chittenden, Cir. 29, Div. Ent., U. S. Dept. Agric., 1898. 
Exutsir: Adult, work, and figure. 
PEAR-BLIGHT BEETLE; SHOT-BORER. 
Xyleborus pyri Peck. 
‘(Formerly X. dispar. ) 
For general account see Hubbard, Bul. 7, n. s., Div. Ent., U. 8. Dept. —gric., pp. 
22-23, 1897. 
Exuisir: Adult, work, and figure. 
THE PEAR BLISTER MITE. 
Eriophyes pyri Pagenst. 
For detailed account see Slingerland, Bul. 61, Cornell Univ. Agr. Exp. Sta., p°- 
317-528, figs., 1893. 
Exuisir: Work and figure. 
THE PEAR PSYLLA. 
Psylla pyri Linn. 
(Formerly P. pyricola. ) 
For general accounts see Slingerland, Bul. 44, Cornell Univ. Agr. Sta., 1892; Mar- 
latt, Cir. 7, Div. Ent.; U.S. Dept. Agric., 1895. 
Exurisitr: Adult and figure. 
THE PEAR SLUG. 
Eriocampoides limacina Retz. 
(Former.y Eriocampa cerasi. ) 
For general account see Marlatt, Cir. 28, Div. Ent., U. 8. Dept. Agric., 1897. 
Exuisit: Adult, work, and figure. 
