380 Howard . — On some Diseases of the 
2. The macro- and micro-conidial stage of Trichosphaeria 
Sacchari, Massee. 
This form is widely distributed throughout the West Indian 
Islands, and also occurs in Surinam, British Guiana, and Java. 
It has been described and figured by Went (7, 13, 14), under 
the name of Thielaviopsis ethaceticus y Went. This observer 
found that it gave rise in Java to a disease of cane-cuttings 
known as the ‘ pine-apple’ disease. Massee (5) has also described 
and figured it, and has shown that it is parasitic on the cane. 
The development of both macro- and micro-conidia from 
a single conidium of these two kinds is described in a previous 
paper (17). 
In addition to the formation of these conidia at the ends 
of the hyphae, similar spores are also formed inside the 
vegetative hyphae. In rare instances chlamydospores are 
formed in the mycelium. 
As in Java, the fungus in the West Indies by no means 
confines itself to the sugar-cane. It is common on bruised 
fruits such as bananas and pine-apples, and frequently destroys 
many of the pine-apples sent from Antigua to London during 
the voyage. It is probable that it gains access to them at 
bruised surfaces. 
As mentioned above, this fungus is principally of importance 
in Java on account of its causing the ‘ pine-apple * disease of 
cane-cuttings, and, as mentioned by Went (13), is not very com- 
mon on growing canes. Accordingly when examining some 
of the cane-cuttings which died out or failed to grow at all in 
Barbados during the planting-seasons in December, 1900 and 
1901, and which amount to 25 to 50 per cent, of those planted, 
depending on the season, this fungus was especially looked for. 
In a large number of cases Thielaviopsis was found in these 
dead cuttings, and when it did not occur other Fungi were 
noted which appeared to have something to do with the arrest 
of growth of the cuttings. It appeared likely, after examining 
many hundreds of these dead cuttings, that Fungi are instru- 
mental in destroying them. Of these, Thielaviopsis was met 
