93 
The samples of the dried leaves are being sent to your Lordship 
by parcels post. 
I have, &c., 
(Signed) G. JENNER. 
The Marquess of Salisbury, K.G., 
&c., &oc., &c. 
ee ] 
REPORT of Mr. Henri Pittier on the diseases which have at 
different times appeared in the offen plantations of Costa Rica. 
During the existence of the Instituto Fisico Geografico several 
coffee diseases were submitted for study to the  botanical 
dopant: 
Firstly, the so-called “ Maya,” E UE 2 dried zones of 
dead tissues on the leaves, black rotten spots on the fruit, an 
the MN EE: falling off of Both. “The fungus which idee the 
destruction of the tissues has been identified independently by 
two ash Messrs. Rolfs, of the Florida State Agricultural 
Pha. and Spegazzini, of the “Facultad de Agronomia " of La 
with the Stilbum flavidum, Cooke (Pistillaria flavida 
Sp or azz 
Secondly, the * Hollin" or *Fumagina," which appears as a 
kind of a soot covering the leaves of the coffee tree, and which is 
also a fungus s (Capnodiu m trichostomum, ae but in this 
case the fungus is only a secondary symptom it grows on a 
honey-like nn. = Po insect (Coccus, scale eat mealy bug) 
which settles on t 
Thirdly, several ds of distinct appearance, one due to the 
invasion of a of caterpillars of a moth, the name of which I 
do not no ember, and others which were ascribed to over- 
cropping, ^ rot diem s een drainage, or to the presence 
of foul wood in the soil. 
These last were all a. or less localised = disappeared after 
x time, but the two first are rather common in the neighbourhood 
San Jose, where der re-appear every Fear with a gradually 
more epidemic tendency. 
However, so far they cannot be said to have assumed a very 
alarming character, and the majority of the planters have not 
paid ae o them 
Owing to i dw excessive drought I have not been able to find 
any trace of the -o on the cati leaves ; but these are sure to 
appear with the first rains in April and May, and if not too late for 
you, I shall gladly een to en some good samples for you. 
(Signed) H. PITTIER. 
MR. CoNsUL HARRISON TO ROYAL GARDENS, KEW. 
ritish Consula te, 
San José, Costa R 
SIR, February 98, "1809. 
In ee An acircular I received from Her Majesty’ 5 
Minister in Central America, I sent His Excellency for despatch 
to the Royal ee Gardens, Kew, some pamphlets and notes on 
the diseases which have appeared in the coffee trees in this 
Republic. 
