Forest entomology . y common in many parts of the country, and is, infact, one of the most dreaded pests of the arboriculturist. At thesame time, it may be noted that it often confines itself to compara-tively small areas, or to isolated park trees. In general appearancethe trunks and larger branches of beech-trees infested with this pestpresent the appearance of a shower of snow having frozen. This pesthas been graphically termed the felt scale by Miss 221 is a representation of this scale on beech. Where the pest is but sparsely distributed on the stem littledamage accrues ; but
Forest entomology . y common in many parts of the country, and is, infact, one of the most dreaded pests of the arboriculturist. At thesame time, it may be noted that it often confines itself to compara-tively small areas, or to isolated park trees. In general appearancethe trunks and larger branches of beech-trees infested with this pestpresent the appearance of a shower of snow having frozen. This pesthas been graphically termed the felt scale by Miss 221 is a representation of this scale on beech. Where the pest is but sparsely distributed on the stem littledamage accrues ; but it is sometimes found about a quarter to half an1 Newstead, vol. ii. p. 214. COCCID^. 235 inch in thickness, and when such is the case the bark separates fromthe stem, and the tree ultimately dies in consequence. This insect confines its attacks exclusively to the beech (Fckjkssylvatica), and, by reason of its whitish appearance, must not be con-founded with the various species of Chermes (Aphidse) on larch, silver. Fig. 221.—Cryptococeua fagi on beech. (From F. V. Theobald;Forest Trees.) Animal Pests of fir, Weymouth pine, &c. It should also be noted that the copperbeech is all but immune from this insect - pest. In fact, I haveoccasionally seen cases where the copper beech was grafted on thecommon beech, of the pest appearing fairly thick on the stock orcommon beech portion, and the copper beech portion above havingonly here and there the smallest possible specks on it. 236 FOREST ENTOMOLOGY. On moving the white covering about midsummer, the insects maybe found in all their respective stages. The adult female is of a sulphur-yellow colour, about half a line,or -Jg- of an inch, in length, convex above and below. The creature isboth Avingless and legless, and has, therefore, no power of mouth-organs are placed on the under side of the body, and arecomposed of long hair-like appendages, forming mouth or sucking-tube and anchorage. She covers her body with the w
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