I notice in the November number of the Monthly a complaint from a Philadelphia correspondent of a new disease which has of late attacked that queen of climbing roses the"Marechal Neil," and that you express surprise thereat and ask for the expression of your readers regarding it.

I fear you will receive similar discouraging reports from this latitude also; but whether the actual cause has been ascertained or not, I am not informed. My own opinion is, that the severity of our climate is the only assignable cause, and that this rose is more delicate than others of its class. I judge this to be so from the fact that it flourishes most luxuriantly in Florida, and we hear nothing of the disease affecting it there; and from the manner in which the disease attacks the stem here. The bark for about one-third of the circumference, and with it the wood extending to the heart, seems to die as with blight or frost, of course sapping the life of the tree. It is, however, a lingering death, for the uninjured wood struggles manfully and often nearly surrounds the dead with a new growth, but only to prolong its uncertain existence, for the fatal wound is never fully healed. There may also be the knotty excrescence of which your correspondent speaks. This applies to old bushes only, the young and newly imported trees, chiefly on grafted or budded stocks, as yet show no signs of disease, and were more beautiful than ever this Autumn, with their immense flowers.

But there are many old and very large bushes here, and the complaint is general that they are dying, no remedy having been found efficacious. Many roses, the"Chro-matella," for instance, will outlive such an injury, and new wood will soon cover the old scar and the bush become as vigorous as ever. Not so with our favorite. Another disease which has not yet attacked the rose to any extent, though I have noticed it slightly upon a large and thrifty "Lamarque," has killed the beautiful evergreen Euonymus latifolius. Nearly all are dead, and the few remaining in the city are fast yielding up the ghost. No remedy for this has been discovered. It is a species of the bark-lice family, perhaps the same that attacked the orange in Florida several years ago, and unlike that pest of the apple tree, but one which I have never seen until the past year. Whale oil soap and whitewash have no effect upon it. Cannot some of your correspondents give some information with regard to this pest, or how we may exterminate it? I noticed yesterday, in a new cemetery near the city, but one large bush killed by this disease; the other and younger ones had thus far escaped, but their time will shortly come.