F. T. Brooks 227 



13. Richards, R. !\I. and Sutcijffe, H. (1914). Hevea br<mlien8i8, the general 



structure of the tree, etc. The Malay Peninsula Agricultural Association. 



14. Ridley, H. X. (1913). Spices. London. 



If). Rutgers, A. A. L. (1014). Report of the International Rubber Congress and 



Exhibition, Hat a via, p. 63. 

 Iti. Rutgers, A. A. L. and Arens, P. (1014). Diseases of Hevea brasilienais in 



Java. Rubber-recueil, International Rubber Congress, Batavia, p. 136. 

 17. Saccardo, P. A. Sylloge Fungorum. Vol. vi, p. 108. 



EXPLANATION OF PLATES. 



PLATE XXXIII. 



Fig. 1. Root of rubber tree with strands and conidial fructifications of Sphaerostilbe 

 repens. Natural size. (Water-colour sketch by Mr F. de la Mare Norris.) 



Fig. 2. Stilbum stage of Sphaerostilbe repens. x 30. (Water-colour sketch by Mr F. 

 de la Mare Norris.) 



PLATE XXXIV. 



Fig. 3. Photograph of rubber tree attacked by Sphaerostilbe repens and by boring 

 beetles. The bark has been removed to show the upward extension of diseased 

 wood (f7) from the root system. 



Fig. 4. Conidia of Sphaerostilbe re]iens formed in a pure culture on Hevea wood. Some 

 spores are thick-walled. x 450. 



PLATE XXXV. 



Fig. 5. Cephaleuros sp. Material growing on a clove leaf. The species on rubber leaves 



is apparently the same. x 600. 

 Figs. 6 and 7. Photographs of branches of rubber trees attacked by Loranthus. + is 



a branch of Hevea, p is a part of the parasite, h in Fig. 7 is a mass of hypertrophied 



tissue belonging chiefly to the host. 



15—5 



