8 
Island of Krakatau in the Canina setts Herb. N°. 3527, 
April 24th 1919. 
Verlaten-Eiland, idem Herb. N°. 33756, April 28th 1919. 
1) Beitrag IV. Marcellia. Vol. IX, 1810. N°. 158, p: 173. 
Literature: 
N°, 
The leaf galled by a psyl- 
lida. 
On the apices of the stems and 
of the young leaves are setted large 
numbers of psyllae. The gall arising 
from this infection strongly impres- 
ses the observer as being caused by 
22. 
2) Beitrag VI. Bull. d. Jard. Bot. Buitenzorg. Série If. N°. III, 
1912, p. 5. 
3) Ueber die Entw. und Anat. einiger Markgallen ete. Rec. d. 
Trad. bot. Neerland. Vol. XIII, 1514, p. 24. 
Vernonia cinerea Less. 
Fig. 22. Vernonia cinerea Less. — 
an Aphis. The leaves become shri- 
velled because the midrib does not keep up with the more ‘papi 
growth of the leaf-blade. Two 
of such leaves are reproduced 
in fig. 22. 
Island of Krakatau, in the 
Casuarina-grove, Herb. 
Ne. 2528. April 24th 1919. 
No, 23. Wedelia biflora. BI. 
The leaf galled iad 
mite. 
This is one of ‘he com- 
monest gall-growths of the — : : 
tropical shore-flora. It has 
been already described from - 
 Java') and Saleier 2). The. | 
little galls develop — prinei- : 
pally | on the under-surface of — 
. sie the ‘ramifications = the veins _ fig. 23). 
