a7 
On the upper surface of the leaf there is a small flat bladder 
(see fig. 15, and fig. 16 at a) on the reverse a — 
clothed with a white erineum, con- 
sisting of pluri-cellular hairs, some- 
times branched, growing criss-cross. 
Island of Krakatau. Herb. N°. 3510. 
Arptl 24th 1919, Herb. N°. 3722 a, 
April 27th 1919. 
Litirature: 1) eerie Ill. Marcellia. Vol. IX. 
910. N°. 134, p. 
2) ae aus Celebes his Bull. 
d. Jard. Bot. Buitenzorg. Série 
it, N°. Xi, 1916, N*. 51. 
Figure 51, p. 39. Fig. 15. Pithecolobium umbellatum Bth. 
N°. 16. Pithecolobium umbellatum Bth. 
A leaf-gall caused by a gall-mite. 
This gall-vegetation has also been described from Java ') and 
Saleier 2). It occurs everywhere but is not quite so tagphecsia as 
the previous gall. They are discoid 
swellings, (Figure 16) measuring 1—1"/, 
mM. bulging out on both sides of the 
leaf. On the under-surface the gall is 
convex, on the upper-surface it is quite 
flat, with a slight depression at the 
centre. Here is situated the aperture 
leading to the gall-cavity, which con- 
tains excrescences from the inner wall. 
Island of Krakatau, on the shore, : q . 
Herb. N°. 3511. April 24th 1919. Fig. 16. Pithecolobium . Bik. 
Literature : 1) yerrn VII. Bull. Jard. Bot. pee Série mm. a ay, 
: 914, N°. 482. Figure 219 
, p- 49. oe 
2) Gallen aus Celebes etc. ‘Hem ts et, XXI, 4916. N?. 52, p. 39. ae 
“N°. 1 _ Premna integrifolia Le 
A pietes = asied esl a gall-mite. i 
found | nm cn Salen tno ee 
