Parasites of Scale-Insect Fungi. T. Petch. 209 
New Guinea, parasitic on a Hyfocrella on Imperata. Hypocrella 
is a genus of entomogenous fungi. Professor H. Sydow has 
kindly furnished me with a specimen from the type collection, 
which agrees completely with the published description. 
The genus Sivosperma has black, subcarbonaceous, globose 
pycnidia, indistinctly ostiolate, superficial, on a subiculum con- 
sisting of fuscous hyphae. The spores are minute, ellipsoid, 
continuous, hyaline, produced in chains from the pycnidial wall, 
without any basidia. It is said to be near Sirccoccus, but to 
differ from the latter genus in the presence of a subiculum and 
the absence of basidia. 
The type species, Sivosberma Hypocrellae, has very minute 
pycnidia, 70-100, diameter, crowded together on the surface 
of the host stroma. Its hyphae overrun the latter and penetrate 
into it. On the surface of the Hypocrella the hyphae are closely 
septate, with unequally broad segments, like the hyphae of a 
Dematium; within the stroma they are more regular and the 
segments are longer. The pycnidia have a parenchymatous wall, 
andare fleshy, not carbonaceous. The spores measure 2—3 * I-5 p. 
Sivosperma differs from Sivosphaera in lacking basidia and 
having hyaline spores. In both genera the persistence of the 
spores in chains in the pycnidium is remarkable. Even in free- 
hand sections they retain their position. On staining with 
methyl violet it is found that the chains are embedded in a 
hyaline amorphous substance. This substance is not visible in 
unstained sections, but it stains blue with methyl violet. 
In February 1921, I collected a pycnidial fungus at Hun- 
stanton (England), on Lefidosaphes ulmi on Hawthorn, the 
insect having been previously attacked by Cephalosporium sp. 
The material is not in very good condition, but the fungus 
appears to be referable to Sivosperma. The pycnidia are black, 
globose, obscurely ostiolate, up to 80 diameter, scattered over 
the scale but chiefly along the edge. The wall is rather thick, 
but the outer layers are more or less disorganised and overlie 
a thin, brown, parenchymatous layer consisting of polygonal 
cells, 3-6 broad. The spores are hyaline, oval, 1-5-2 x Ip, 
produced in chains. The mycelium of the fungus consists of 
brown irregular hyphae, 3 diameter, closely septate, with 
abrupt angular bends, sometimes united here and there into 
thin sheets by lateral fusion. I name this species Szrosperma 
‘sparsum. In the present instance, it is parasitic on Cephalo- 
sporium sp. on Lepidosaphes ulmi. 
BYSSOSTILBE. 
In the Fungi of Ceylon, No. 1003 (Journ. Linn. Soc. XIV, 
1875, p. 113), Berkeley and Broome described a species as 
M.S. . 14 
