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BRITISH GALLS 
Homop- 
tera 
y > 
Fungi 
Homop- 
tera 
at the base of the bud ; eggs green. Gall opens about 
the middle of July; the alatae migrate to the Larch. 
Chermes viridis Ratz. 27 
Syn. Adelges viridis Ratz. 
Burdon, Journ. Econ. Biol., 1908, vol. ii., p. 124. Houard, 
No. 102. 
Gall usually terminal, similar to that of A. abietis , but 
much smaller, about the size of a large pea ; usually pale 
green with a whitish bloom, the mouths of the cavities 
seldom coloured. Growth never prolonged beyond the 
gall. Weak buds on poorly grown shoots are chiefly 
attacked. Aphis black, becoming greenish-brown in spring, 
seated on the bud ; eggs yellow or greenish-yellow. The 
galls open about the middle of June; the alatae migrate to 
the Larch. (Plate X. 2.) 
Chermes strobilobius Kalt. 
Syn. Adelges strobilobius Kalt., Cnaphalodes strobilobius 
Kalt. 
Connold, Plant Galls, fig. 112, a. Burdon, Journ. Econ. 
Biol., 1908, vol. ii., p. 124. Houard, No. 94. 
Picea orientalis. Oriental Spruce. 
Gall terminal, elongated; usually one side only of the 
shoot is affected, and it becomes curved. The swollen 
bases of the needles do not usually fuse together to form 
definite cavities. Greenish-yellow with reddish hairs on 
the swollen parts. The shoot grows beyond the attacked 
part. Aphis dark brown, becoming yellowish-brown, 
seated on the stem a little distance below the bud; eggs 
brownish-yellow. According to Cholodkovsky, the inter¬ 
mediate hosts of this species are Pinus sylvestris and 
P. strobus. 
Chermes sibiricus Cholod. 
Syn. Adelges sibiricus Cholod. 
Abies pectinata D. C. Common Silver Fir. 
Fusiform cankered swelling on the branches, with a 
mass of erect twigs bearing stunted yellowish leaves grow¬ 
ing upon it. The aecidia are produced only on the leaves 
of the “witch’s broom,” not on the swollen branch. The 
teleutospore form occurs on species of Cerustium. 
(Plate XVII.) 
Aecidial stage of Melampsora CERASTII Persoon 
Syn. Urcdo caryophyllacearum Johnst., Peridertnium 
elatmum Wallr. 
Plowright, p. 248. Connold, Plant Galls, fig. 113. 
Larix europaea D. C. Common Larch. 
Needles bent, often at right angles, discoloured and 
swollen, with a dark brown woolly aphis seated in the 
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