24 Transactions British Mycological Society. 
to examine the type specimens of both these species; that of 
Nectria coccorum is immature, but it appears to me to be 
identical with Nectria coccogena. Both the type specimens show 
a Pseudomicrocera conidial stage which is identical with Pseudo- 
microcera Henningsit. In Ceylon, this Nectrza has been collected 
on two occasions, in each case developing on the old stromata 
of Pseudomicrocera Henningsi, and I have an immature gather- 
ing from Mauritius. Pseudomicrocera Hennings, therefore, is 
the conidial stage of a Nectria. But the earliest name yet dis- 
covered for this Nectria is Nectria diploa B. and C., which was 
given to specimens from Cuba in 1875. 
In 1901, Nomura published a paper* on the Scarlet Fungus 
Disease of Scale Insects in Japan, describing the fungus as a 
new species, Nectria coccophila. His paper was written in 
Japanese and has been generally overlooked, but in 1913 it was 
summarised by Miyabe and Sawada in their account of the 
fungi parasitic on scale insects in Formosa. Nomura, apparently, 
did not leave any type specimen, and the identity of his species 
is uncertain. Miyabe and Sawada would appear to favour the 
view that it was the species which they assign to Sphaerostilbe 
coccophila, but Nomura’s description agrees more closely with 
Nectria dvploa. 
In 1913, Sydow? described a new genus and species parasitic 
on a scale insect in Japan as Coccidophthora variabilis. Subse- 
quently K. Harat, who had sent the fungus to Sydow, stated 
that the specimen consisted of two species, viz. a Nectria para- 
sitic on the scale insect, and a second species parasitic on the 
Nectria, and he described the scale insect Nectria as Nectria 
variabilis. I have not been able to examine a specimen of this 
Neciria, but from the published figures and the description it 
would appear to be again Nectria diploa. 
A number of species have been described as Microcera, nine 
of which were said to be parasitic on scale insects. It is evident 
that the genus requires revision from the systematic standpoint, 
but at present only the scale insect species have been critically 
examined. Fortunately, most of the types of the latter have 
been available. 
In 1904, McAlpine described § two species of Microcera para- 
sitic on scale insects in Australia, viz. Microcera tasmaniensis 
and Microcera Mytilaspis. The types of these species have been 
kindly lent me by Mr C. C. Brittlebank, and examination shows 
that they are identical, the first being a younger development: 
of the second. This species proves to be neither Microcera nor 
* Imp. Agric. Exp. Sta., Rep. 18 (1901), p. 105. 
7 Ann. Myc., xi (1913), p. 263. 
{ Botanica! Magazine, Tokyo, xxviii (1914), p. 339. 
§ Agric. Journ. Victoria, 11 (1904), pp. 646-648. 
