272 Bulletin Jard. Bot. Buitenzorg, Série 111, Vol. IV. Livr. 2. 



No. 10. Evodia triphylla DC. 



A leaf-gall caused by a gall-mite. 



This gall resembles closely the mite-gall on Evodia accedens Bl. caused 

 by Eriophyes evodiae Nal. The small flat bladders are to be found on the upper- 

 surface of the leaf. On the reverse side, thèse bladders are covered with a white 

 erineum. The bladders are irregularly rounded and of about 8 mm. diameter. 



New-Territory, Sha-Tin, underbrush. 16 Nov. 1920. No. 4950. 



No. 11. Faradaya splcndida F. MUELL. 



Leafgall caused bij an aphid. 



The leaves are shriveled and folded. Like 

 the case of infections by Aphidae the leafblade 

 grows out beyond the main nerve which remains 

 shorter. Often the tops of the twigs bear 

 bunches of infected leaves. See figure 10. 



Hongkong, Botanic Garden, 6 Nov. 1920. 

 No 4916. 



No. 12. Ficus chlorocarpa Benth (prob). 

 A leaf-gall caused by a psyllida. 



The plant from 



Fig. 10. An Aphid-gall on 

 Faradaya splendida F. Muell. 



X ;4- 



Fig. 11. Psyllid-galls on Ficus 

 chlorocarpa Bf.nth. X ^A- 



which 1 collected the 

 gall was a small shrub without fruit and therefore 

 1 could not détermine the real name, perhaps 

 it may be the above mentioned species. The 

 gall closely resembles the psyllida-gall on Ficus 

 glomeraia ROXB. very common in Java and also 

 found by me in Siam. The uppersurface of the 

 leaf was thickly covered with reddish or red 

 ballshaped swellings, about 3 mm. in diameter. 

 See figure 11. On the undersurface there are 

 small swellings with an aperture in each leading 

 into a spacious gall-chamber. 



New-Territory, Sha-Tin, along a dry ditch. 



10 Nov. 1920, No. 4944, 



Literature: D. v. L. Java IV. No. 172. 



No. 13. Ficus rctusa L. 



A leaf-gall caused by a thrips. 



Very common in ail tropical countries from 

 North-Africa to the Dutch East Indies. Both 

 halves of the leafblade remain smaller and are 

 folded together, so that the underside of the 

 leaf forms the ouside of the gall. The galls are 

 mostly reddish brovvn in colour. The thrips inside 



