BUTLER AND HAFIZ '207 



The species does not seem to agree with any of those pre- 

 viously described. About 30 are known on various grasses, but 

 none on Saccharum. The diagnosis is as follows : — 



HelmintlLOsporium Sacchari Butl. n. sp. Maculis amphig- 

 enis, elongatis, initio rubris, dein avellaneis vel stramineis ac 

 ferrugineo-marginatis, 'd-?<5 V 2-6 mm ; ciespitulis minutis, atris ; 

 hyphis fertilibus erectis, simplicibus, 3-iO — septatis, geniculatis, 

 olivaceo-brunneis, apice pallidioribus, 100-190 V 5"5-7'o im. : coni- 

 diis acrogenis, cylindraceis vel oblongo-ellipticis, utrinque 

 rotundatis, o-10-septatis, crassissime tunicatis, olivaceo-brunneis, 

 85-60 Y 8-5-12 yu. 



in tblis Sacchari officinarmn in India, or 



A fungus which, from the published descriptions, bears a 

 considerable resemblance to the above, is known in Java and 

 Hawaii under the name of CercofipoTa Sacchari, Br, de Haan. 

 It was first described by Breda de Haan in Java,* as the cause 

 of a leaf disease to which the name "eye spot" was given. A 

 further account was subsequently published by Dickhoff and 

 Heinf. In Hawaii it has been briefly described by Cobbj. 

 From the figures published in Wakker and Went's well-known 

 text-book of sugarcane diseases^, it appears probable that this 

 fungus is really a Helminthosporium and not a Cercospora. A 

 comparison of the two fungi has not been possible and could alone 

 settle the question of their identity. 



Little requires to be said regarding the treatment as, so far, 

 this disease has not been found to damage the crop materially. 

 If it became severe, it would be advisable to strip off and destroy 

 the affected leaves in the early stages of the attack (we have 

 found the first spots in June, at Pusa). There are a good many 



* Bicda de Huan, J. Van. Kood Rol en andore Zieklen in het Suikerriet. Meded. van hct 

 Proefstation West Java, XVI, 18'J2. 



t Dicklioff, W. G. &,S. A. Arendseu Hein. Ecnige Waaiueniiiigen omtrunt de Oogvlckkeu- 

 /.iekte. Archief Java SuikeiindusLiie, IX, I'JOl, p. 86.0. 



X Cobb, N. A. Fungus Maladies of the Sugarcane. Exper. Stat, of the Hawaiian Sugar 

 Plantersi' Association, Division of Pathology and Physiology, bull. No. t;, 19U'J, p. 3<>. 



§ Wakker, J. H A: F. A V. C. Went. Dc Zickten van het Suikcrrict op Java. Leiden. 



i><'js, Pi. XXI, figs. \-r>. 



