400 
Besides this however the same trees were infested by another 
kind of larva whose work on the tree is more superficial. Its pre- 
sence was revealed by finding on the surface of the bark long 
arched tunnels of irregular direction reminding one of the similar 
structures made by white ants : the delicate fabric of the arch was 
made up of tiny particles of Mango bark closely bound together by 
numerous silky filaments secreted by the animal. This larva was a 
caterpillar of length about one inch : dorsally it is dark brown in 
colour and its skin is chitinously thickened except at the joints 
where it is thin and of a pale colour. Ventrally also it is pale. 
Each segment bears a few bristly hairs: abdominal segments 3, 4, 
5, 6 and 9 each have a pair of prolegs. 
When this animal is irritated it vomits a dark brown juice. 
It is usually to be found in a self constructed pit situated at one 
end of the tunnel: it evidently leaves the tunnel at times— probably 
at night for the bark of the tree has been gnawed away over a fairly 
large area in the vicinity of the tunnel, To some extent this cater- 
pillar also bores into the wood but scarcely sufficiently to do much 
damage in that direction. A number of these larvae were taken 
away in a corked tube in the hope of rearing the image: one cater- 
pillar discovered the cork and entered it. This it riddled in all 
directions and then constructed some arched tunnels on the surface. 
After a period of about two months a small moth emerged from the 
interior of the cork. It proved to be a species of Arbela, a genus 
allied to the English Cossus, the goat moth. This small moth is 
rather stout, has white hind wings and the pale front wings bear 
two elongated brown spots. The third insect found on these trees 
is the small beetle which Occurs in all stages of its life history in the 
Mango fruit and which is so well known as not to require descrip- 
tion again. It belongs to the family Curculionidae ( weevils ) and is 
known as Cryptorhynchus mangiferas. 
The infested trees were of the species, Mangifera foetida known 
to Malays as Bachang or Lembachang. 
John Hewitt. 
RUBBER. PHOTOGRAPHS 
The India-rubber Journal of July 31st, 1905, contains under the 
International Rubber Planters Association notes, a series of 18 un- 
usually fine photographs of Para Rubber and Ficus Elastica trees 
taken by Mr. P. W. BURGESS in the Botanic Gardens and Lanadron 
Estate. 1 he photographs show growth, methods of tapping the 
crepe machine, and the prepared material, and form a most instruc- 
tive series of photographs; explanatory notes are given with the 
pictures. The pamphlet is on sale at the price of sixpence to mem- 
bers of the association on application to the publishers. — Editor . 
