DOCTEKS VAN Leeuwen : GalLs of Krakataii and Sebesy. 301 



Krakatau, April 24th 1919. No. 3505. 



Verlaten-island, April 27th 1919. No. 3723b. April 26th 1921. No. 5331. 



Sebesy, April 23th. 1921. No. 5130. 



Literature: D. v. L. Krakatau. No. 5, Figure 6 and 7. 



* No. 35. Hibiscus tiliaceus L. 



A leaf-gall caused by a gall-mite. 



On the undersurface of the gall are developed irregular vvliite hairgrowths. 

 Thèse erinea may cover the whole surface of the leaf-blade. On the 

 uppersurface there exists only a darker coloration. 



This gall is the same as previously described on Hibiscus similis Bl. 



Krakatau-island, on the beach. January 19th 1922. No. 5971. 



Literature: D. v. L. Java IV. No. 176. 



No. 36. Hibiscus tiliaceus L. 



A leaf-gall caused by a coccid 



The leaves are wrinkled and dark 

 green, the leaf-stalk remaining niostly 

 very short so that bunches of galled 

 leaves are formed. See figure 11. 

 Probably identical with the coccid 

 gall on the buds of the same plant, 

 already described from Celebes. 



Verlaten-island, April 27th 1920. 

 No. 4180. 



Literature : D. v. L. Celebes No. 34. 

 figure 34. 



No. 37. Homalanthus populneus 

 Grah. 



A leaf-gall caused by a psyllida. 



Already described in my former 

 paper on Krakatau galls. Fig. il. A coccid-gall on Hibiscus 



Krakatau, in the hills about 300 M. tiliaceus L. X i. 



April 26th 1919. No. 3647. 



Literature: D. v.L. Krakatau No. 6. figure 8. 



* No. 38. Ipomoca dcnticulata R. Br. 

 A leaf-gall caused by an aphid. 



The attacked leaves are curved and wrinkled and smaller than the 

 normal ones. Often accumulated in bunches. 

 Verlaten-island, April 24th 1920. No. 4119. 



