79 
1 mM. in size, whilst the under-side bear a hardly perceptible 
swelling, at whose centre is the orifice leading into the small 
gall-chamber. The wall of the gall is fairly thick and glabrous, 
both inside and out. 
Island of Krakatau. Herb. N°. 3506. April 24th 1919. 
Literature: 1) Gallen aus Celebes, etc. Bull. d. Jard. Bot. de Buitenzorg. 
Série LE N°) AA, 4916. N°. 64. Figure 64, p. 43. 
2) Beitrag VIII. ileus Série III. Vol. I, 1919. N°. 674, p. 68. 
N°. 19. Terminalia Catappa L. 
A leaf-gall probably formed by a gall-gnat. 
Of this gall-growth I found but few specimen, moreover from 
all of them the tenants had already emer- 
ged. The galls reproduced in fig. 19 are all 
situated on the leaf-margin, which seems K Mp 
to be the most usual position, but I found is i: 
a few galls in the middle of the leaf-blade, \< me a 
near the large secondary veins. 2 
They are tiny slender cylindrical growths, \ < 
about 3 mM. long and '/, mM. thick, at- ey be \ 
tached to the leaf-blade by a broad basis. Ne . 
On the lower surface of the leaf nothing ee ‘ 
is to be seen except a little spot. Within is - 
found a narrow gall-cavity communicating 
with the outer world by an aperture in 
the apex (see fig. 19 ata.), through which 
the gall-producer had presumably emerged 
from the gall. Probably the present gall is one produced by 
gall-onats 
Island of Krakatau. Herb. N°. 3507, April 24th 1919. 
Fig. 19. Terminalia Catappa L. 
*N°. 20. Thespezia populnea Soland. 
The leaf galled by a Psyllida. | i 
IT am acquainted with this gall also from Jaya but it oe oS 
not yet been published in description. It probably occurs | 
loaned this common shore-plant grows. The leaf-margins se 
oA ly “near the distal ene, ~~ “upwards to. a smaller or 
