[334] On the Apple and Pear, 158. The beetle Mr. Knight alludes to is probably the Polydrosus oblongus, which answers his description, and is common on pear-trees.—In Holland, it is stated in a little tract on this subject (Verhandeling ten bewijze &c. door F. H. van Berck. 8vo. Haarlem 1807), that the great destroyer of the blossoms of their apple- and pear-trees is the larva of another weevil, Anthonomus Pomorum, which from the name and Gyllenhal's addition to the habitat given by Linné—"quas destruit"—should seem to be injurious in Sweden also.
[335] Reaum. ubi supr. 475.
[336] On Fruit Trees, 271.
[337] On the Apple and Pear, 45.
[338] Reaum. ii. 499.
[339] Mr. Scales.
[340] See Observations on this Insect in the 2nd volume of the Horticultural Society's Transactions, p. 25. By W. Spence.
[341] Reaum. iv. 69. t. 5. f. 6, 7.
[342] A solution of quick-lime is recommended in the Gardener's Magazine for January 1828, a periodical work which every friend of Horticulture ought to possess.
[343] This Aphis is evidently the insect described in Illiger's Magazin, i. 450. under the name of A. lanigera, as having done great injury to the apple-trees in the neighbourhood of Bremen in 1801. That it is an Aphis and no Coccus is clear from its oral rostrum and the wings of the male, of which Sir Joseph Banks possesses an admirable drawing by Mr. Bauer. On this Aphis see Forsyth, 265; Monthly Mag. xxxii. 320; and also for August 1811; and Sir Joseph Banks in the Horticultural Society's Transactions, ii. 162. Those Aphides that transpire a cottony excretion are now considered as belonging to a distinct genus, under the name of Myzoxyla.