120 Transactions British Mycological Society. 



The white superficial layer (cf. T. rubra), noted by Zimmer- 

 mann, appears to be of rare occurrence. It occurs in a collection 

 on an Aleyrodid on Hedyotis verticillaris, Nuwara Eliya, De- 

 cember 1917. 



In a collection on Fiorinia ruhrolineata on Saprosma zey- 

 lanicum Bedd., Hakgala, May 1910, there is a thin, dense, 

 hyaline region at the base of the stroma, succeeded by a loose 

 yellow-brown zone, then a more compact, narrow, red-brown 

 zone, followed by another loose yellow-brown zone, and finally 

 a red-brown external layer. Thus, in vertical section the stroma 

 exhibits zonation, which perhaps indicates a periodic stoppage 

 of growth. 



The purple-red colour of the hyphae is discharged by lactic 

 acid. Dilute hydrochloric acid turns the hyphae brown. This 

 action of acids may account for the natural colour change of 

 the stroma. 



Torrubiella tenuis Fetch in Ann. Perad. vii (1922), p. 323. 



Stromata pulvinate, flattened pulvinate, or almost plane, up 

 to 1-5 mm. diameter, white, tomentose, rather loose internally, 

 sometimes surrounded by a broad, white, fibriUose margin or 

 hypothallus. 



Perithecia usually produced on the thicker part of the stroma, 

 sometimes on the margin or hypothallus, sometimes occurring 

 singly on scales which do not bear any stroma except a slight 

 weft of hyphae at the base of the perithecium, scattered or 

 clustered, elongated flask-shaped or elongated conoid, 0-65- 

 0-9 mm. high, 0'2-o*25 mm. diameter below, pale amber to 

 pale yellow-brown, pale yellow or yellow-brown by transmitted 

 light, subtranslucent, clothed with hyphae up to two-thirds 

 their height, or almost glabrous; asci long, cylindrical, capitate, 

 eight-spored, 7/x diameter; spores filiform, as long as the ascus, 

 septate, dividing into cylindrical part-spores, 3-6 x i^n. 



Ceylon; on Aspidiotus destructor on a jungle tree, Pundaluoya, 

 coll. E. E. Green, 1899 (Parkin, type 2, p. 19) ; on a black Aleyro- 

 did on Sarcococca pruniformis Lindl., Hakgala, May 1912; on 

 a scale on Hedyotis Lessertiana Arn., Hakgala, January 1914; 

 on Aleyrodes on Lasianthus Walkerianus Wight and Psychotria 

 elongata Hk. f., Hakgala, January 1914 (Plate II, fig. 6). 



The stromata in this species are usually smaller than in 

 T. luteoro strata, and the perithecia in pulvinate examples are 

 situated more usually on the thicker central area of the stroma, 

 and more embedded in it. Old herbarium specimens may 

 acquire a slight brownish tint. Parkin compared this species 

 to T. tomentosa, from which it differs in its very slender perithecia. 



The hyphae of the stroma are flexuose, thick-walled or almost 

 solid, generafly stout, 3-5-5 /x diameter, with a few 2-5 ;Lt dia- 

 meter. Very fine hyphae, less than i/a diameter, have been 



