The Norway maple (A. platanoides) is somewhat smaller than the preceding species, being more compact and umbrageous. It is widely planted in private grounds and in parks, hut is less valuable for street planting than the above because of its shorter trunk. It is a native of Europe. The sycamore maple (A.
pseudo-platanus), another European species, is smaller still, attaining only about 70 feet. • It is also widely planted in America as well as in Europe, being a vigorous, rapid grower and succeeding upon a great variety of soils. The common maple (A. campestre) occasionally at tains 50 feet, but is usually a smaller tree or even a shrub. It is of European origin and is widely planted.
The Japanese maple (A. japonicum, A. pal matum and other species) are small trees or shrubs which because of the great diversity of form of their leaves and their dainty habit have become widely popular in the parks and gar dens of the United States and Europe. Their exceptionally brilliant autumnal coloring is taken advantage of in Japan where in the fall they approach the chrysanthemum in popularity.
The maples furnish food for a large number of insects, some of which live upon the green parts and others upon the wood. Several spe cies of scale insects (q.v.) are often abundant enough to do considerable damage. The cot tony maple scale (Pulvinaria innumerabilis), Pseudococcus acerss, a European insect, and the "'gloomy" scale (Aspidiotus tenebricosus), a southern species, are among the most trouble some. Several caterpillars live upon the leaves, the forest tent caterpillar (Malacosoma dis stria), the fall web-worm (Hyphantria cunea), and the larvae of the tussock moth (Orgyia leu costigma), being the most generally important. The maple worm (Anisota rubicunda) is fre quently very destructive. It is the larva of a moth. Of the borers, the larvae of Dicerca divericata and Glycobius speciosus, which are beetles in the adult state, and those of .Egeria acerni, a clear-winged moth, are among the best known. The second beetle mentioned is known as the sugar maple borer. Consult Bailey, 'Standard Cyclopmdia of Horticulture' (New York).