DOCTER S VAN Leeuwe n : Galls of Krakata u and Sebesy. 305 



No. 50. Nauciea purpurascens KORTH. 

 A leaf-gall caused by a gall-mite. 



Described from Krakatau. Fiat irregular vesicles on the uppersurface 

 of the leaf. 



Krakatau, Apri! 25th 1919. No. 3621. 



Literature: D. v. L. Krakatau, No. 11. figure 13. 



No. 51. Nephrolepis biserrata SCHOTT. 

 A leaf-gall formed by a gall-mite: Erlophyes paiiropus Nal. 

 Common ail over the tropics and already described from Krakatau. 

 Recently appeared a publication on thèse galls on différent varieties 

 of Nephrolepis. 



Krakatau, April 24th 1919. No. 3573; idem Apri! 25th No. 3598. 



Verlaten-island, April 28th 1919. No. 3741. 



Sebesy, April 23th 1921. No. 5171; April 27th. 1921. No. 5340. 



Literature: D. v. L. Krakatau No. 12. 



D. V. L. Ueber die vom Eriophyes pauropus Nal. an verscliiedenen 

 Arten von Nephrolepis gebildeten Gallen. Annales du Jardin botanique 

 de Buitenzorg. Vol. XXXI. 1920. p. 83. Tafel XIV. 



No. 52. Nephrolepis hirsutula PR. 



A leaf-gall caused by a gall-mite : Eriophyes pauropus NAL. 

 Same gall as the foregoing. 



Lang-island, September 29tli 1896, BOERLAGE coll. 

 Krakatau, about 800 M. April 26th 1919. No. 3694; idem beach, October 

 6th 1919. No. 3823; idem January 24th 1922. No. 6133. 

 Verlaten-island, April 22th 1920, No. 4047. 

 Sebesy, Cocos-jungle April 22th 1921, No. 5103. 



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



No. 53. Oplismenus compositus BEAUV. 

 A gall of the shoots caused by an aphid. 



Described from Java. The internodia remain short and the leaves small 

 se as to form a bunch, wherein the plant-lice live. 



Verlaten-island, in a ravine, about 150 M, April 26th 1920. No. 4161. 



Literature: D. v. L. Java II, No. 73, figure 40. 



* No. 54. Paederia tomentosa Bl. 



A leaf-gall caused by a gall-mite: Eriophyes pdederiae NAL. 

 Common in Java on P. foetida; small conical excrescenses mostly on 

 the undersurface of the leaf. Average size '^l^ mM. 

 Sebesy, Cocos-jungle. April 25th 1921. No. 5247. 



Literature: D. v. L. Java II, No. 74, figure 41. 



