It is worthy of note that the Coorg plant is not nearly so liable to attacks of leaf disease as the original Mysore Chick plant.  I have seen a tall plant of the latter variety heavily attacked, while a Coorg plant partly under it was only slightly attacked on the side next the Chick plant, and hardly at all on the side not under the Chick plant.  I observe, too, from the Planting Correspondent’s Notes in the “Madras Mail” of January 30th, 1892, that the same thing has been observed in Coorg, and that occasional Mysore plants, which had by some accident found their way into the Coorg coffee, got the disease first, and that it then spread into the surrounding coffee.

It should be borne in mind that leaf disease does not kill the tree, but only injures it, and diminishes its powers by depriving it of much of its foliage, so that there is nothing alarming in leaf disease when it is controlled by good management of the tree, and good shade, cultivation of the soil, and manuring; and the only case I can hear of where anything like permanent injury has occurred, is where the disease has existed under the shade of bad caste trees.  But it is far otherwise with the justly dreaded Borer insect, which, however, can, as we shall see, be effectively controlled by good shade.  To the attacks of this insect I now propose to direct the attention of the reader.

The too well-known coffee Borer is a beetle, about as large as a horsefly, which lays its eggs in any convenient crevice, and generally, it is supposed, near the head of the tree, in the bark, or wood of the coffee tree.  After the larvae are hatched they at once burrow their way into the tree, where they live on the dead matter of the inner or heart-wood of the stem, and there they reside from, it is supposed, three to five months, till their transformation into winged beetles.  Then they bore their way out of the tree, and fly away to carry on their mischievous work.  This insect has been declared to be, by Mr. John Keast Lord, “a beetle of the second family of the Coleoptera Cerambycidae, and to be closely allied to a somewhat common species known as the wasp-beetle (Clytus avietis), which usually undergoes its changes in old dry palings.”  And in a collection made by M. Chevrolat in Southern India, and now in the British Museum (at least it was so in 1867, when Mr. Lord investigated the point), a specimen was found, to which the name of Xylotrechus quadrupes was attached.  This Borer, like the leaf disease, has probably always attacked coffee, but the earliest probable notice of it is to be found in Mr. Stokes’s Report on the Nuggur Division of Mysore, in about 1835, where he observes that coffee trees in dry seasons often wither and snap off suddenly at the root.  The cause, or probable cause of this he does not state, but there can be little doubt that the Borer had attacked the trees alluded to.  Since then the Borer seems to have attracted little or no attention till towards