230 
Explanation of Plate. 
Fig. I.—4A portion of peel from a diseased orange, showing the "9 
very slightly magnified. 
Fig. II.—Larva of Aspidiotus ficus (after Comstock). 
Fig. III.—4A portion of eei orange peel, highly magnified. 
a. F er first moult. 
с. . Female » second moult adult. 
igs. IV. and V.—Views of adult females, showing the different 
outline of the scale. 
Fig. VI.—Adult, winged male (after Comstock). 
CCXIIL—REDISCOVERY OF GUTTA PERCHA TREE 
AT SINGAPORE. 
(Dichopsis Gutta, Benth.) 
The following account of the continued existence in the island of 
Singapore of the original species (originally described as Jsonandra 
Gutta, Hook.) from which Gutta Percha was first obtained;is transla 
(with some compression) E P note 2 5, Sérullas in the Comptes 
Rendus for September 15, 1890 (pp. 428—426). 
“ The existence of Gutta ial was announced to the civilised world 
in 1842 by Dr. W. Montgomerie. The priority in this respect of the 
traveller ‘Tradescant has not been established. ae mgr ease the first 
specimens which reached Europe under the name, coming from Singa- 
pore, were brought to London in April 1843 by Sir den osé d' Almeida. 
“ In bringing to light their remarkable properties no tim e was lost. by 
Hancock. heatstone, moreover, who had been speculating since 1837 
on a telegraphic union ‘between England and the Continent, conceived 
the idea of employing them for this purpose, but it was not until the 
104 anuary 1 а 
Mr. Walker іп the English Channel. This cable, whose length, how- 
ever, was only two miles starting from Folkestone beach, was sheathed 
with Gutta Pe 
“ Since that time numerous attempts have been made to replace Gutta 
Percha for this purpose, now that the demand is so great, and it is 
year. i o 
of Mimusops Balata trom the Guianas, have only given negative results. 
As for that of Payena Leevii (Gutta Sundek), if it is in actual use 
to-day it is simply owing to mistake on the part of the collectors. 
“The only gums which are of use as insulators for cables are produced 
by trees of the genus /sonandra (now sunk. : Dichopsis). Their 
natural habitat is pi й in the Malayan regi 
^. of the interesting zone of I Malay forests proceeds 
rapidly. The ейн cut every available tree, and repeat the process 
as fast as a spring up again ; they nes thus suppressed for the last 
40 years their reproduction and multiplicatio: 
