618 Horticultural Society and Garden. 



clay, something nearly approaching to brick earth ; and at 2 ft. below this 

 sour stiff clay it is all chalk, which is the case with all the land near to, or 

 situated between, the Chiltern Hills, as this place is • the situation is a 

 wide valley, which opens to the north into the Vale of Aylesbury. I ought 

 to inform you, there is a double row of sycamores and limes at the back of 

 the peach and nectarine garden wall. The branches do not overhang the 

 wall, but some of the sycamores are within a few feet of doing so. I ob- 

 serve that the foliage of those sycamores is every year, in the months of 

 May and June, covered by thousands, and tens of thousands, of the green 

 fly. I have heard it asserted that the green flies which infest the sycamore 

 and lime do not infest the peach and nectarine ; for my own part, I cannot 

 observe any difference by comparing them together, as I have frequently 

 done : they are all, apparently, the same kind of insects, at least as far as I 

 am able to judge, from colour, shape, and size. On turning to the article 

 Insects in your Encyclopedia of Gardening, § 2224., it is said, " The insects 

 that infest plants are almost as numerous as the plants themselves, almost 

 every species having a particular insect, which it seems destined by nature 

 to support." This may be true in hundreds of cases, but certainly does 

 not hold good in all. The red spider, for instance, is an insect that 

 infests the peach, nectarine, vine, French bean, melons, and many other 

 plants, in a dry season, and those that are kept in a dry heat, On turning 

 to the article Red Spider (read " Spider ") in your Encyclopedia, it says, 

 " The only two British species which infest plants are the J'carus telarius, 

 and J'carus holosericeus." I have no motive for noticing these things, only 

 from the circumstance of the sycamores and limes being so very near the 

 garden wall, and being, at the same time, as I observed before, so much 

 infested with the green fly at the time those insects attack the peach and 

 nectarine trees. If you can suggest any thing whereby the evils I have 

 mentioned may be got quit of or mitigated, or can point out where the best 

 information is likely to be got on this business, it will be considered a great 

 and lasting obligation conferred on, Sir, &c. — R. Watts, gardener to R. G. 

 Russell, Esq. Chequer 's Court, Wendover, Bucks, August 16. 



We recommend the above letter to some of our practical friends who 

 have lately written on the peach, the pear, and the preparation of borders. 

 ™ Cond. 



Art. VI. Horticultural Society arid Garden. 



July 20. — Exhibited. A collection of Carnations and Picotees, from 

 Mr. Hogg of Paddington. Princess Augusta Pelargonium, Potentilla Rus- 

 seWidna, and Georgina flowers, from Mi*. Russell, Enham Nursery, Batter- 

 sea. Black Hamburgh Grapes, from Mr. George White, gardener to Sir 

 Rowland Hill, Bart., Hawkstone Park, near Shrewsbury. Fruit in Spirits 

 of the Lucuma, from Alex. Caldcleugh, Esq., of Valparaiso. A small Gourd, 

 from the Hon. T. H.J. Strangeways, F.H.S. 



Also, from the Garden of the Society. Four sorts of Posa fndica; Rose 

 Bourganville ; Drummond's Thornless Rose ; a collection of Garden Roses ; 

 Tellium ^iolaceum ; Calceolaria arachnoidea ; J'nthemis arabica ; Esch- 

 sch61tza« califdrnica ; Clintonfa elegans; three varieties of Ferbena; Silene 

 compacta ; five varieties of Pentstemon • Galardia aristata • twelve varieties 

 of Oenothera • Clarke pulchella ; two varieties of Papaver ; ilfalope ?«ala- 

 coides-. Petunia nyctaginiflora • Coreopsis lanceolata; Collomia grandiflora ; 

 three varieties of Phlox ; Centaurea Cyanus • nine varieties of Campanula ; 

 Lodsa nltida. Four sorts of Pears ; two sorts of Apples • Wilmot's new 

 Early Orleans Plum ; two sorts of Apricots ; Elton seedling Strawberry ; 

 twenty-six sorts of Gooseberries. 



