DOCTERS VAN Leeuwen : Galls of Krakataii and Sehesy. 295 



This one is a rolling of the leaf-border to the upperside of the leaf. The 

 surface of the gall is rough and of a reddish coloiir. 



The wali of the gall is thicltened and brittle, breaking if one tries to 

 open it. On Java this gall vvas also tenanted by Dolcrothrlps taurus 

 Karny (syn. Eothrips taurus (Karny). 



Sebesy-island, in the virgin forest of the mountain about 200 M. élévation, 

 April 25th. 1921. No. 5240. 



Litcrature: D. v. L. Vil. No. 380. 



Coccinea cordifolia COQN. 



See the description of the gall of Trichosantlies tricnspidata LOUR. 



No. 11. Derris heterophylla BARKE. 

 A flower-gall formed by a gall-gnat. 



Described in my former contribution on the galls of Krakatau. {syn. 

 Derris uliginosa Benth.) 



Island of Krakatau, April 24th 1919. No. 3512. 

 Literature: D. v. L. Krakatau No. 2, figure 3. 



* No. 12. Eugenia spec. 1. 

 A leaf-gall caused by a psyl- 



lida. 



This gall is new to me. On 

 the undersurface of the leaf are 

 deveioped shallow small oval 

 dépressions. On the uppersurface 

 of the leaf there exists only 

 a dark green coloration. The 

 gall dépressions are situated 

 between the offshoots of the 

 main-nerve lying more or less in 

 a row. The nymph of the psyllid 

 fits snugly in the dépression, 

 average diameter about VjoXnhA. 



Sebesy-island, hill-top, about 

 700 M. April 25th 1921. No. 5255. 



* No. 13. Eugenia spec. 2. 



A leaf-gall caused by a psyl- 



lida. 



Same gall-form as the fore- Fis- 5- A psyllid gall on Eugenia spec. X '/. 



going, but bigger. Average diameter 2 mM. 



On the uppersurface is a yellow-coloured bubble. The galls are chiefly 

 situated naar the base of the leaf. See subjoiiied figure 5. 



Sebesy-island, hill-forest, about 300 M. April 25th 1921. No. 5316. 



