_Leaf Insects._--There are several varieties, which cause the leaves to curl and prematurely fall. This kind of curled leaf differs from the one described as the result of sudden changes and cold wind; that appears general wherever the cold wind strikes the tree, while this only affects a few leaves occasionally, and those surrounded by healthy leaves. The remedy is to syringe them with offensive mixtures, as tobacco-juice, or sprinkle them when wet with fine, air-slaked lime. _Varieties._--Their name is legion, and they are rapidly increasing, and their synonyms multiplying. A singular fact, in most of our fruit-books, is a minute description of useless kinds, and such descriptions of those that they call good, as not one in ten thousand cultivators will ever try to master--they are worse than useless, except to an occasional amateur cultivator. Elliott, in his fruit-book, divides peaches into three classes: the first is for general cultivation; under this class he describes thirty-one varieties, with ninety-eight synonyms. His second class is for amateur cultivators, and includes sixty-nine varieties, with eighty-four synonyms. His third class, which he says are unworthy of further cultivation, describes fifty-four varieties, with seventy-seven synonyms. Cole gives sixty-five varieties, minutely described, and many of them pronounced worthless. In Hooker's Western Fruit-Book, we have some eighty varieties, only a few of which are regarded worthy of cultivation. Downing gives us one hundred and thirty-three varieties, with about four hundred synonyms. In all these works the descriptions are minute. The varieties of serrated leaves, the glandless, and some having globose glands on the leaves, and others with reniform glands. Then we have the color of the fruit in the shade and in the sun, which will, of course, vary with every degree of sun or shade. We submit the opinion that those books would have possessed much more value, had they only described the best mode of cultivating peaches, without having mentioned a single variety, thus leaving each cultivator to select the best he could find. Had they given a plain description of ten, or certainly of not more than fifteen varieties, those books would have been far more valuable _for the people_. We give a small list, including all we think it best to cultivate. Perhaps confining our selection to half a dozen varieties would be a further improvement:-- 1. The first of all peaches is _Crawford's Early_. This is an early, sure, and great bearer, of the most beautiful, large fruit;--a good-flavored, juicy peach, though not the very richest. It is, on the whole, the very best peach in all parts of the country. Time, from July 15th to September 1st. Freestone. 2. _Crawford's Late_ is very large and handsome; uniformly productive, though not nearly so good a bearer as Crawford's Early. Ripens last of September and in October. Fair quality, and always handsome; freestone; excellent for market.