12 



THE CHAFF SCALE. 



Parlaloria pcrcjandei Comst. 



(Food plants: Japonica, lemon, orange. ) 



For bibliography and food plants see Fernald, Cat. Coccidfe of 'World, Bui. 88, 

 Mass. Agr. Coll., pp. 319-320, 1903; Marlatt, Yearbook, U. S. Dept. Agric, 1900, 

 p. 270, 1901. 



Exhibit: Infested twigs. 



THE SAN JOSE SCALE. 



THE SAN JOSE SCALE. 



Aspidiotus 'j>ernicios'US Comst. 



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

 catalpa, chestnut, cralj-apple, crab-grass, cherry, grape, hickory, oak, peach, i)eai-, 

 persimmon, plum, poplar, prune, Rocky Mountain cherry, rose, silver maple, willow, 

 and many other plants.) 



For bil)liography antl food plants see Fernald, Cat. Coccidte 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, fruit, figures, and enemies: Peiililia miseJla Lee, adult and 

 figure; Chilocorns similis Rossi, larva, pupa, adult, and figure; parasite, Aphelinus 

 diaspidis How., adult and figure. 



INSECTS INJURIOUS TO APPLE. 



For special treatises on apple insects see Bruner, Trans. Nebr. St. Hort. Soc. f. 

 1894, pp. 155-223, 1895; Harvey and Munson, Bui. 56, Maine Agr. Expt. Sta., 1899; 

 Saunders, Insects Injurious to Fruits, 2d ed., pp. 13-139, 1900. 



INJURIN(i THE ROOTS. 



THE WOOLLY APPLE APHIS. 



Schizoneura lankjera Hausin. 



For general account see Marlatt, Cir. 20, Div. Ent., U. S. Dept. Agric, 1897. 

 Exhibit: Work, figure, parasite, Aphelinus nudi Hal., and enemy, Scytnmis cerri- 

 calis Muls. 



INJURINfl THE TRUNK. 



FLAT-HEADED APPLE-TREE BORER. 



Chrysobothris femorata Fab. 



For general account see Chittenden, Cir. 32, Div. Ent., U. S. Dept. Agric, pp. 

 9-12, 1898. 

 Exhibit: Adult, work, and figure. 



ROUND-HEADED APPLE-TREE BORER. 



Saperda Candida Fal). 



For general account see Chittenden, Cir. 32, Div. Ent., U. S. Dept. Agric, pp. 1-8, 

 1898. 



Exhibit: Adult, work, and figure. 



APPLE-WOOD STAINER; PIN-BORER. 



Pterocyclon nudi Fitch. 



( Form erl y Mo n artlirum . ) 



For general account of this and an allied species, M. fasciatum Say, see Hubbard, 

 Bui. 7, n. s., Div. Ent., U. S. Dept. Agric, pp. 26-28, 1897. 

 Exhibit: Adult and figure. 



