BY D. McALPINE. 97 



Australian Alps, Yic. (Walter); on pliyllodes of Acacia 

 peunincrvis, Sieber. : Werribee, Vic. (Robinson); on phyllodesof 

 Acacia pycnantha, Benth. 



The characteristic spots with the raised and bursting pustules 

 the cylindrical septate conidia which may be bent or flexuous, and 

 the very short basidia distinguish this species. 



27. Cylindrosporium eucalypti, n.sp. 



Spots definite, grey, generally with distinct raised rudd}^ brown 

 margin, usually roundish but may be angular or irregular, isolated 

 or confluent, on both surfaces of leaf, ultimately thin, brittle and 

 cracking, very variable in size, from 2-3 mm. to 1 inch in diam. 

 Pustules amphigenous, but more numerous and crowded on upper 

 surface, at first covered by epidermis, then erumpent, globose, 

 dark-coloured. Conidia golden-yellowish in mass, hyaline indi- 

 vidually, straight or flexuous, but generally crescent-shaped, acute 

 and tapering at both ends, more gradual at outer end, 3-septate, 

 not constricted at septum, guttulate, 50-56 x 3|-4 ^u; basidia very 

 short, hyaline, slender, 8-10 /x long. 



Dandenong Creek, Vic; on 3''oung green leaves of Eiicalyptms 

 mdliodora, A. Cunn.; Nov., 1902 (C. French, Jr.). 



This is a very distinct species, with its large and definite grey 

 spots dotted with the numerous dark pustules, and the conidia 

 very constantly 3-septate. When the leaf is moistened the conidia 

 have a tendency to ooze out in dirty 3^ellow masses. 



28. DiMERIUM ORBICULATUM, n.sp. 



Spots numerous, orbicular, sooty black, on upper surface of 

 green leaves, sometimes confluent, 2-3 mm. diam. Mycelium of 

 spots crustaceous, forming a pavement of pale olivaceous, closely 

 adherent and appressed, thin-walled septate filaments, varying in 

 breadth but averaging about 7 /x, surmounted by dark brown, 

 flexuous, labyrinthine, thick-coated septate filaments, about the 

 same thickness but often swollen. Conidia lateral on branches of 

 the brown mycelium, similarly coloured, Puccinia-like and lower 

 7 



