94 
I also forwarded some samples of =" affected by the disease 
which the Government obtained for 
I now under separate cover tna xol direct some samples of 
diseased leaves, collected for me by Monsieur Pittier, and two 
phot ographs of trees affected. These trees have recovered, but 
in some instances look sickly. 
I send these direct as Monsieur Pittier tells me SP less they 
travel the better, as the fungus is s to be rubbed o 
, &e. 
(Signed) ’ PERCY C. HARRISON. 
W. T. Thiselton-Dyer, C.M.G., 5 
Director, Royal aa eg Kew, 
The leaves are most ESL attacked, and within a short 
time become dry and fall to the ground, so that the tree is soon 
completely ibid of fone The growing berries also dry up 
and fall before uri M. New leaves are formed after some 
months of rest, Tepr nii be again attacked in a similar manner, 
and after the ohisecutivs loss of taiao for two or three years, 
the tree dies. 
Diseased er are at once known by the presence of one—or 
usually several—more or less circular pale green, then brown, and 
finally whitish patches, which extend quite through the substance, 
appearing equally marked on both sides of the leaf. Grouped on 
these bleached spots, on the upper surface of the leaf, are several 
clear yellow drum-stick-like bodies standing erect. Each of these 
bodies, which are only about one-twelfth of an inch high, is a 
perfect fungus, bearing myriads of reproductive bodies or conidia 
on its globose head. One or more similar circular bleached 
spots bearing fungi also often occur on the berries. 
On young twigs the bleached spots are elongated, varying from 
half to one inch in length. If the er — completely 
iot the twig, the portion above the 
eventive measures. —Those er. = the arrest of 
instance al Cleanliness is of It i 
impossible for e. dingas to appear u oe of the fungus 
are present in neighbourhood, and the most effective means 
otographs. received from Costa Rica showing coffee trees 
completely defoliated by ho  "digaane also show the fallen leaves 
lying in heaps under the 
Diseased twigs should Y "Rural otherwise, should sclerotia 
be formed, and the mycelium become perennial in the tissues, a 
yearly crop of conidia would be produced. 
Description of Figures. 
Fig. 1, coffee leaf showing the disease; nat. size. 2, single patch 
of disease ; slightly magn. 3,two specimens of Stilbum flavidum; 
highly magn. 4, Goff ee berry showing one diseased patch; nat. 
size. A clu n conidiophores of "mes Stilbum, bearing 
a pustule of iur Si emen a, a, conidia; b, 
