Presidential Address. T. Petch. 35 
Fusarium, which was originally described as parasitic on 
Aspidiotus Aurantit in Australia by McAlpine* in 1899 under 
the name of Fusarium epicoccum. Its conidia are variable, 
sometimes nearly straight, sometimes hook-shaped, but the 
typical conidium is stout, short, three-septate, and curved to 
two-thirds of a circle. It was named Microcera Parlatoriae by 
Trabut} in 1907 from specimens on Parlatoria on orange in 
Algeria, Microcera curta by Saccardot in 1909 from specimens 
on a scale insect on Tilia in Germany, Microcera Tonduzit by 
Patouillard§ in 1912, from specimens on Ficus from Costa Rica, 
and Fusarium A spidioti by Sawada|| in 1914 from specimens on 
Aspidiotus on Pyrus in Japan. The interesting point about this 
Fusarium is that the short, curved conidium exactly resembles 
one of the forms of conidia described by Berkeley and Broome 
as part of Sphaerostilbe aurantiicola. It occurs quite commonly 
with Sphaerostilbe aurantitcola in Ceylon, but I have never been 
able to detect the sporodochium in any of my numerous 
gatherings of that species. One mounts the ordinary Microcera 
synnema, or an isolated perithecium, and finds the small curved 
conidium on the slide. It apparently occurs on the slight weft 
of mycelium at the base of the perithecium. It is abundant in 
the perithecial specimens collected at Florence in 1860. I was 
formerly inclined to regard this conidium as typical of Sphaero- 
stilbe aurantiicola, but I have found it a specimen of Sphaero- 
stilbe flammea from Georgia, Ravenel 3376. The question then 
arises whether Fusarium epicoccum is a stage of Sphaerostilbe, 
or whether the conidia found with the Sphaerostilbe are intrusive. 
Against the first theory, there is the fact that all the collections 
of the Fusarium, with one exception, contain only the Fusarium, 
and the exception is such a mixture that nothing can be deduced 
from it, as it includes Sphaerostilbe, Pseudomicrocera, and 
Podonectria on the same leaf. Against the second, we have the 
pee of any gathering of the Fusarium sporodochium from 
eylon. 
Another Fusarium, Fusarium coccidicola, was described by 
Hennings in 1903 from specimens on tea collected in German 
East Africa. I have not seen the type, but from the description 
it would appear to be Pseudomicrocera. 
A Hyphomycete, which is of considerable economic importance 
in the Eastern Tropics, was described by Zimmermann** in 1898 
* Fungus diseases of Citrus trees in Australia, 1899. 
+ Bull. Agric. Alger et Tunisie, 1907, p. 32. 
~ Ann. Myc. vii (1909), p. 437. 
§ Bull. Soc. Myc. France, xxvIlII (1912), p. 142. 
|| Bot. Mag., Tokyo, xxvuit (1914), p. 312. 
| Engler’s Bot. Jahrb. (1903), p. 57. 
** Over eene Schimmelepidemie der groene Luizen, Buitenzorg, 1898. 
ls 
