DOCTERS VAN Leeuwen : Sonie galls froiii Hongkong. 



277 



No. 28. Rhus succedana L. 



A leafgall caused by a gall-mite. 



Same gall as in the foregoing on Rhus hypoleuca Champ, but not so 

 abundant on the leaf. Moreover the surface of the gall is not yellovv or 

 redbrovvn, but more light green or yellowish green. 

 See figure IQ, which shows the underside of the leaf. 



Hongkong, in open places, about 60 feet above 

 sealevel. 8 Nov. 1920. No. 4940. 



No. 29. Schefflera octophyWa {=^ Meptaplcuram oct. 

 Hance). 



A leafgall caused by a gall-mite. 



On either surface are developed granular patches 

 which consist of light-greenish outgrowths of the epidermis 

 of the leaf. Yellow bladders with the granular patches 

 on their convex or on the concave sides may also be 

 developed. In Java we found a similar gall on species of 

 Macropanax. 



Hongkong, Botanic Garden, 6 Nov. 1920. No. 4913. 

 Literature : D. v. L. Vil. No. 454 and 455. figure 208. 



Fig. 19. Mitte-galls 

 on Rhus succedana 

 L. nat. size. 



No. 30. Toxocarpus Wightianus HOOK. 

 A leafgall caused by a gall-mite. 



On the upperside of the leaf are formed small granular irregular patches 

 of a bright-red colour. On the underside no trace of the gall istobeseen. 

 Hongkong, underbrush near the sea. 8 Nov, 1920. No. 4935. 



No. 31. Uvaria microcarpa CHAMP. 



A leafgall caused by a gallmite. 



The underside of the leaf is partly covered with a red 

 brown erineum which in the beginning is white. The galls 

 are really large bladders, which may change the form of the 

 whole leaf. A similar gall has been described by A. TROTTER 

 on Uvaria macrophylla from Singapore. 



Hongkong Island, thinly wooded locality. 8 Nov. 1920. 

 No. 4939. 



Literature: A. TROTTER. Miscelanee cecidologiche. 

 Marcellia Vol. XVI. 1917. p. 150. 



No. 32. Uvaria microcarpa CHAMP. 



A stemgall probably caused by a moth. 



Spindleshaped swellings of the woody tissues of the 

 stem, covered by the ordinary, but not tliickened bark. The 

 galls were abandoned by the gallformers which probably 



Fig, 20. Moth- 

 galls on Uvaria 



microcarpa 

 Champ. X ^4- 



are moths. See figure 20. 



