298 BULLETIN JARD. BO T BUITENZORG, SÉRl^IJj^ VOL. IV. LlVR. 2. 



Verlaten-island, April 23th 1920, in the hills about 100 M, No. 4088; 

 idem April 26th, No. 41Ô5. 



No. 22. Ficus hispida L. 



A leaf-gall caused by a gall-mite. 



The same kind of gai! as described on Ficus fistiilosa Reinw. See 

 No. 19. On tiie uppersurface there are flat concavities, of a pale-yellow- 

 green colour, on the opposite place of ths leaf irregular and granular 

 accumulations. Average size 2 — 10 mM. 



1 hâve found this gall in Sumatra (erroneously described from Ficus 

 hirta Vahl) and Malacca (Singapore, Kuala Lumpur, Penang). hi Sumatra 

 near Padang, Benkulen, and on the border of the Sunda-strait. On Sebesy 

 the gall is fairly common and well developed, on Krakatau veryrare; and 

 in Java 1 hâve never met with it on this very common plant. Probably 

 this gall-mite has been introduced to the islands from Sumatra. 



Verlaten-island, April 26th 1920, in the hills about 100 M. No. 4160. 



Sebesy-island, April 22nd 1921, Cocos-jungle, No. 5121 and secundary 

 forest April 23th 1921, No. 5166. 



Literature: D. v. L. Sumatra, No. 13. 



No. 23. Ficus pubinervis Bl. 



A leaf-gall caused by a gall-midge. 



The main-nerve is swollen into a fusiform gall which is more 

 developed on the undersurface than on the uppersurface of the leaf. The 

 leafblade itself is often atrophied and folded, especially when the whole 

 nerve is developed into a gall. They are 10—20 mM. long and 3-5 mM. 

 thick. Inside there are a good many ball-shaped larval chambers lying in 

 a row. 



Island of Krakatau, ait. 700 M. January 22nd. 1922. No. 6071. 



Literature: D. V. L. Java VIII. No. 576. 



* No. 24. Ficus pubinervis BL, 

 A leaf-gall caused by a gall-mite. 



Granular accumulations on the undersurface of the leaf, the same 

 kind of gall described on Ficus fistulosa Reinw. (See No. 19). 

 island of Krakatau, about 700 M. January 22nd 1922. No. 6070. 



No. 25. Ficus ribes REINW. 

 A bark-gall probably caused by a gall-midge. 

 Already described in our first paper on Krakatau-galls. 

 Krakatau, April 26th 1919, young forest in the hills, about 300 M. 

 No. 3648. 



Literature : I). v. L. Krakatau, No. 4 figure 5. 



