210 Transactions British Mycological Society. 
Hypomyces stilbiger. Its spores were said to be multiseptate 
and its conidial stage to be stilbiform. As regards the latter 
character it would not be unique among Hypomyces in Ceylon, 
since Hypomyces flavolanatus Petch has a Stilbum conidial stage. 
Its ascospores, however, are decidedly different from those of 
a Hypomyces; on referring to Berkeley and Broome’s illustra- 
tion (loc. cit. Pl. V, fig. 26) it will be seen that they figure a long 
septate spore which divides up into disc-like part-spores, like 
a rouleau of coins. Actually, the ascospores are filiform, as long 
as the ascus, and divide into part-spores only as long as broad, 
the part-spores finally rounding off and becoming spherical 
spores which retain their original position in lines in the ascus 
for a considerable time. 
Saccardo transferred Hypomyces stilbiger to Berkelella from 
the description. As examination of the type showed that it 
could not be included in that genus, a new genus, Byssostilbe, 
was instituted for it in Ann. Perad. v, p. 296. Byssostilbe, in its 
perithecial stage, is a Torrubiella in which the part-spores are 
as broad as they are long. 
The type species, Byssostilbe stilbigera, is parasitic on various 
species of Tvichia and Hemuitrichia in Ceylon. Its conidial stage 
is the fungus recorded from Ceylon as Stilbum tomentosum. Two 
other species of Byssostilbe have since been found in Ceylon, 
both parasitic on entomogenous fungi, one on Torrubiella 
luteorostrata Zimm., and the other on Cordyceps dipterigena 
B. and Br. Their conidial stages have not yet been observed. 
Byssostilbe fusca Petch, n.sp. Perithecia conoid, apex obtuse 
or papillate, 0-4 mm. high, 0-25 mm. diameter, blackish-brown, 
darker above, subtranslucent, glabrous. Asci very long, cylin- 
dric, capitate, 6-8 » diam., eight-spored. Spores filiform, as long 
as the ascus, dividing into spherical part-spores, 1-25-1-5 
diameter. On the stroma of Torrubiella luteorostrata Zimm. on 
an Aleyrodid on Murraya exotica, Hakgala, Ceylon, April 1917. 
This species differs from Byssostilbe stilbigera in the colour and 
shape of the perithecia; in the latter species, the perithecia are 
pale yellow to amber, elongated flask-shaped, up to 0-6 mm. 
high, 0-2 mm. diam. 
Byssostilbe tomentosa Petch, n.sp. Mycelium usually covering 
the stroma of the host fungus (Cordyceps) with a thin compact 
white film. Perithecia clustered, forming continuous groups on 
the perithecial or conidial stromata of the host fungus, conoid, 
0:45 mm. high, 0-3 mm. diameter, with a dense tomentose coat, 
0-05 mm. thick, except at the apex, adherent laterally but 
readily separable, white; ostiolum conical, yellow, subtrans- 
lucent. Asci 4: diameter, very long, capitate. Spores filiform, 
as long as the ascus, Ip diameter, dividing into part-spores 
oe 
