144 Transactions British Mycological Society. 
and Mytilaspis citricola (Pack.) Comst., on Citrus nobilis Lour. 
They also described a new species, Ophionectria tetraspora 
Miyabe and Sawada, which differed from Ophionectria coccicola 
in having conidia with acute or obtuse tips, usually in fours, 
and ascospores, 50-64 x 6°5-7°5 p. 
Meanwhile, Seaver, in 1909, had transferred Ellis and Ever- 
hart’s species to a new genus, Scoleconeciria. The latter genus 
contains species provided with a stroma, and having spores 
from three- to many-septate. It thus includes species which 
were formerly referred to Ophionectria and Caloneciria, the 
common distinguishing character being the presence of a stroma. 
Seaver describes the stroma of Ophionectria coccicola as rounded, 
more or less prominent, whitish. The fungus forms a thin, 
white, byssoid layer, which spreads out from the scale over the 
leaf, or stem, in a more or less circular patch, if the scales are 
far enough apart to permit it to develop without interference. 
This layer becomes brownish, and the hyphae fuse together, in 
part, into a membranous sheet, which separates readily from 
the leaf. The perithecia and sporodochia are produced on this 
sheet, often at some distance from the scale insect. Where the 
scale insects are crowded, the thin sheet of hyphae grows over 
them and binds them together. 
Of course, the hyphae of the fungus also penetrate the body 
of the scale insect, and the central part of the stroma is slightly 
elevated by the presence of the latter within it; but elsewhere 
the stroma is thin, flat, and membranous. 
The practicability of separating species of Nectria into genera, 
according to the presence or absence of a stroma, has been 
questioned by other mycologists. But if that basis of division 
is followed, it would seem preferable to restrict the term stroma, 
in that application, to the parenchymatous forms. If the term 
is used to include any basal layer of hyphae, the classification 
becomes unworkable. Ophionectria coccicola does not possess a 
stroma in the sense that Nectria cinnabarina does. 
Seaver’s separation of Scoleconectria from Ophionectria, on 
account of the presence of a stroma in the former, cannot stand 
if such a basal layer as that of Ophionectria coccicola constitutes 
a stroma. For, as previously stated (Ann. Perad., v, p. 285), 
in the type species of the genus Ophionectria, Ophonectria tr- 
chospora (B. and Br.) Sacc., the perithecia are seated on a thin, 
byssoid layer, which is just as good a stroma as that of Ophio- 
nectria coccicola. Therefore, the original genus Ophionectria is 
stromatic, in the sense in which the writer understands Seaver 
to employ that term, and the separation of Scoleconectria as a 
stromatic Ophionectria is based on a misunderstanding of the 
nature of the type species of the genus Ophionectria. 
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