SOME GALLS FROM HONGKONG. 



by 



W. DOCTERS VAN LEEUWEN. 



Buitenzorg — Java. 



On my way to Japan I had an opportunity to visit Hongkong for a 

 few days and 1 filled in my time by making a few trips in the vicinity 

 of the capital and in the New-Territory on the mainland of China. On 

 thèse excursions I was able to look for galls, which up to présent as far 

 as I know, hâve not yet been described from this région. It is possible 

 that in the article of V. Frauenfeld ,,Notizen iiber die Fauna Hongkongs 

 (Sitz. B. d. K. Ak. d. Wissensch. Wien. Ed. XXXV, 1859, p. 241) notes on 

 galls may be found, but our library does not contain the above mentioned 

 publication. Therefore a short description of the galls collected by me will 

 perhaps be of interest to the students in this field of natural history. 1 am 

 quite sure that further research will add many new forms, but the végétation 

 of this région which is not very rich in forms, may also account for 

 the gallflora which is not as rich as in other hot countries. 1 am much 

 indebted to the kindness of Mr. Oreen, Director of the Botanic Garden of 

 Hongkong, who gave me the opportunity of studying the plants in the 

 herbarium of the Garden and who provided me with an excellent Chinese 

 guide on my trip to the New-Territory. 1 hâve not seen real virgin forests, 

 but there were several spots in shady places along small rivulets which 

 offered an excellent hunting ground for galls. In ail I hâve collected 

 34 galls distributed as follows: 



15 were caused by gallmites, 



6 „ „ „ gallmidges, 



4 „ „ „ thrips, 



4 „ „ „ psyllidae, 



4 „ „ „ moths, 



1 was „ ,, an aphid. 

 The thrips were studied by Dr. Karny who will publish his results 

 later. 1 was unable to détermine the name of one plant. Most of the gall- 

 forms occur also on Java, Sumatra and Malakka. For the détermination 

 of the infected plants 1 hâve employed the flora of Kwantung and Hongkong 

 by Dunn and Tutcher (Kew Bulletin N. X, 1912) and the collection of 

 spécimens in the Hongkong herbarium. 



