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coidea , which causes the “red rust” of tea; but, whereas 
the latter lives on the surface of the leaves of tea and most 
tropical trees without causing much damage, Cephaleuros 
parasitica Jives inside the leaf, and only its fruiting 
branches are visible externally like a tuft of minute red 
hairs. C. parasitica is fairly common on cinnamon and tea 
in the low country; on cinnamon it causes a dark-brown, 
stellate, raised patch, while on tea it produces a spot which 
superficially resembles “Grey Blight,” The red spot on 
clove leaves is due to the death of the tissues attacked by 
the alga, not to the colour of the latter. Neither on tea, nor 
cinnamon, nor clove does it cause ant serious damage. 
Some of the branches of the clove trees were found to be 
killed by Loranthus cuneatus ; and in one case, where a 
branch had been broken off, the main stem was attacked 
by Fames substygius, which is thus proved to be a wound 
parasite. 
CASTILLOA VERSUS PARA RUBBER. 
In a little book published for the La Zacualpa Rubber 
Company by 0. H. Harrison there are some statements of 
'nterest as to growth and yield of the Castilloa trees which 
are cultivated at La Zacualpa estate in Soconusco, Chiapas 
State, Mexico. 
The Castilloa of this region is described by Mr. 0. F. 
Cook as a new species under the name of Castilloa lactiflua 
to distinguish it from other species of which the milk does 
not flow freely but has to be collected in the form of scrap. 
The Castilloa rubber is described as next to Para in 
quality, far more productive in quantity and of all rubber 
trees responding most readily to cultivation. 
One feels bound to say however that the account given 
of the returns in the booklet hardly bears out these state- 
ments. 
The estate comprises 10,000 acres planted. The trees 
are stated to reach the height of fifty feet and a diameter 
of 12 to 18 inches in a wild state, and as much as 25 pounds 
of rubber is said to have been taken from a tree in one 
season. 
In 1889 and 1890, 5000 trees were planted and are now 
(1908) on an average 18 to 20 inches in diameter and 40-50 
feet tall and yield 2| lbs. about per tree. 
