276 Bulletin Jard. Bot. Buitenzorq, Série m, Vol. IV. Livr. 2. 



c^^ 



No. 24. Phyllanthus Emblica L. 



A stem-gall caused by a moth. 



Spindleshaped swellings of the woody (issues of 

 the stem, covered by the brown bark of the normal 

 stem. Iiiside there is a spacious larval-chamber tenanted 

 by a Caterpillar. See figure 16. 



Hongkong, Eastern part of the island, on rocky coast. 

 8 Nov. 1920. No. 4923. 



No. 25. Piper Hancei MAXIM. 



A leafgall caused by a thrips: Oynaikothrips cliavi- 



cae (ZiMM). 



The leaves are folded or curved around the main 



Fig. 16. A moth-gall nerve and are covered with white bubbles which lie 

 011 Phyllanthus Em- . , ,,,,,<■ 



blica L. X 3/4. 'H rows or groups and may cover the whole leaf. 



See figure 17. 



Hongkong, young forest, 



about 300 feet above sealevel. 



8 Nov. 1920. No. 4918. 



No. 26. Piper sarmen- 

 tosum ROXB. 



A leafgall caused by a 

 thrips: Gynaikothrips chavicae 



(ZlMM). 



Fig. 17, A thrips-gall on Piper Hancei Maxim, XV4- 



Fig. 18. Mite-gall on Rhiis 

 hypoleuca Champ. 



The gall resembles more or less the fore- 

 going one, but the attacked leaves are often 

 white or yellowish. Very common in Java, but 

 there they are formed by Gynaikothrips paUipes 

 Karny. 



Hongkong, in shady places, about 300 feet 

 above sealevel. 8 Nov. 1910. No. 4925. 



Literature: D. v. L. Vil. No. 478. 



No. 27. Rhus hypoleuca CHAMP. 



A leafgall caused by a gallmite. 



The upperside of the leaf is covered with 

 hundreds of minute pustules, which hâve a yellow 

 or redbrown colour. On the reverse side a white, 

 velvetlike eriiieum is developed consisting of 

 long white hairs. Size between '/s — 1 rnrn- See 

 figure 18. 



New-Territory, Sha-Tin, along a road. 10 Nov. 

 1920. No. 4942. 



