XEOCOSMOPARA 227 



forming a weft that can be peeled off. On this felt, and on 

 adjoining portions of the dead sheaths of the leaves, the 

 perithecia are produced, resembling black points. These 

 fruits are produced on the dead plants and stubble during 

 the winter months. 



Perithecia black, globose, with a conical, curved beak. 

 Asci clavate, apex rounded, containing eight needle-shaped, 

 slightly curved, 3-septate, hyaline spores, 7-75><3-4 l x , 

 arranged in a parallel fascicle in the ascus. 



The fungus occurs on wild grasses ; it has been met with 

 on species of Agropyron in Italy, and on Bromus sterilis in 

 Australia. The suggestion is that the stubble of diseased 

 patches should be burned, but I do not know how far it 

 is really practicable. Red wheats are said to be most re- 

 sistant. A dressing of Thomas's phosphate and subsequent 

 rolling, also 70 lbs. sulphate of iron per acre is recom- 

 mended. M'Alpine says that oats are not attacked, and 

 may with safety follow a diseased crop of wheat. 



M'Alpine, Depart. Agric, Vict., Bull. No. 9 (1904). 

 Prillieux and Delacroix, Bull. Soc. Myc. France, 6 (1890). 

 Prillieux, Malad. des Planies Agric, 2, p. 221 (1897). 



Ophiobolus herpotrichus (Sacc). Cugini has described a 

 disease of wheat caused by the above fungus, which presents 

 the same general appearance, and produces the same effects 

 as those caused by O. graminis. This disease is confined to 

 Italy. 



Perithecia conico-globose with a small papilla at the apex. 

 Asci containing eight needle-shaped spores, 135-150 X 

 2-2-5 /* 



Cugini, Giorn. Agrar. ItaL, 14 (1880). 



Cugini, Bol. Staz. Agrar. Modeua, 9, p. 46 (1890). 



D. Spores coloured, continuous. 



NEOCOSMOPARA (E. F. Smith) 



Perithecia as in Nectria. Asci cylindrical, spores 8, urn- 

 seriate, globose or subglobose, brown. 

 Conidial forms are known. 



