500 Appendix. 



Australia."* It was introduced into Sydney from California on apple 

 and pear stocks by a nursery firm. Its distribution, given by Mrs. 

 Fernald ('A Catalogue of the Coocidse of the World,' p. 275, 1903), is as 

 follows : — Canada, United States, Chili, Germany, Australia, Japan, 

 China, Hawaiian Islands. 



Plants Affected by the San Jose Scale. 



Mr. S. J. Hunter, M.A., in an article f states that this scale attacks 

 nearly all fruit trees and fruit-bearing shrubs, mainly rosaceous trees 

 and bushes. Professor Webster gives the following as being attacked 

 by A. perniciosus | : — Black Walnut {Juglans nigra), Caroline Poplar 

 (Popidus deltoides), Lombardy Poplar (P. nigra-italica), Golden Leaf 

 Poplar (P. deltoides aurea), European Willow (Salix verminalis), Ameri- 

 can Chestnut (Gastanea dentata), Elm (Ulmus americana), Osage Orange 

 (Toxylon pomiferum), Gooseberry (Bibes uva-crispa), Currant (U. -ruhrum), 

 Cotoneaster {Gotoneaster frigidium), Japan Quince {Pyrus japonica), Rose 

 {Bosa spp.), Flowering Peach (Prunus persica), Flowering Cherry (P. 

 avium), Sumac (Bhus glabra). Grape {Vitis labrusca), American Linden 

 {Tilia americana), European Linden {T. europea), Hardy Catalpa {Catalpa 

 speciosa), and Mountain Ash (Sorbus americana). 



Mr. Howard § gives Apple, Crab Apple, Pear, Bartlett Pear, Duchess 

 Pear, Plum, Japan Plum, Satsuma Plum, Prunus pissardi, P. maritimi. 

 Peach, Apricot, Almond, Black Currant, Citrus albopanetatus, the Loquat, 

 Red Dogwood, June Berry, etc. Professor Lintner || also gives the 

 following food plants : — Acacia, Euonymus, Spiraea, Cratsegus, Persimmon 

 (Diospysos), Alder (Alnus), and the Laurel-leaved Willow of Asia. 

 Howard and Marlatt If also mention amongst others, the Raspberry. 

 Lastly, Mr. Maskell** records.it on the Gum Tree {Eucalyptus corynocalyx) 

 from Adelaide, South Australia. 



Many others may be added (vide Fernald, ' Coccidre of World,' p. 275, 

 and Rept. Conn. Exp. Sta., 1902, p. 132, 1903). 



Appearance of the Scale. 

 The scale is round (sometimes very slightly elongated), flat, and applied 

 close to the bark, leaf or fruit of the tree, resembling to some extent the 

 bark of the twigs in colour. At or near the middle of each scale is a 



■* Agri. Gazette of N. S. Wales, Dec. 1897, p. 874. 



t Bull. Dept. Ento. Univ. of Kansas (Scale Insects), p. 9 (1898). 



t Bull. 81. Ohio Agri. Exp. Station, p. 184 (1897). 



§ Tech. Series, No. 6. Washington Dept. Entomology. 



II Eleventh Eep. State Ento. New York State, p. 



J^Bull. San Jose Scale. 3. Dept. Agriculture U.S.A., p. 38 (1896). 



** Trans. New Zealand Institute, vol. XXVIIL, p. 386 (1896). 



