appears. As to whether the secondary spores borne on the promy- 
celium of germinating teleutospores can directly inoculate a coffee 
leaf is not known, probably not : at least 1 have determined that 
the secondary spores of ff, ■■„<///•/</ fnnrrh-dnu cannot inoculate the 
host that produces uredospores. The question then arises, 
which species of plant is inoculated by the secondary spores? 
I- tnally. does an A>'ri,li„„, stage exist r As already stated there is 
evtdencc in favour of its exisiemv ; again, if so, on what host- 
plant does it occur ? All these doubtful points must be definitely 
settled before we can hope to successfully combat and exterminate 
the disease. 
In the meantime, as usual in the Uredineae, the epidemic or 
rapid spread of the disease is due to the uredospore stage of the 
fungus. In places where the nature of the ground and other 
circumstances admit of spraying, Bordeaux mixture is the most 
effective fungicide to use. The mixture should be only half the 
normal strength, otherwise the youngest foliage suffers. 
A cyclone nozzle should be used as a very fine spray is necessary, 
otherwise the mixture accumulates into minute drops, and rolls off 
the smooth surface of the leaf. A quantity of blood serum dis- 
solved and added to the fungicide causes it to adhere better to the 
surface of the leaf. 
Diseased fallen leaves should be collected and burned, otherwise 
the teleutospores which mostly mature after the uredospores, 
are dispersed far and wide on the dry leaves, and in due course 
infect indigenous plants, the resulting crop of uredospores in turn 
attacking the cultivated coffee. 
The following note by Balansa,* a well known botanical collec- 
tor, on a method of cultivating coffee which enabled it to resist 
the disease, as practised in Tonkin, on the slopes of Mount Bavi, 
near Tu-Phap, at an elevation of about 1,600 feet, is of interest, 
" II y a quelques mois je vous a fait parvenir des feuilles de 
cateier attaquees par CHrnu'lcia. Vous en desiriez de plus 
caracterisees. Les voici. rHrmileia a deja fait d'assez grands 
ravages dans deux de nos champs d'essai, mais dans un troisieme 
occupant un petit plateaux argileux, les cafeiers qui etaient 
infectes du parasite quand je les ai transplanted, en sont, actuelle- 
ment tout a fait debarrasses. 11 faut vous dire qu'ils sont en plein 
soleil, sans abri, et qu'ils ont meme un peu souffert des insolations. 
Je compte beaucoup sur eux. Si mis esperances se realisent, il en 
resulterait qu'on a bien tort dans certains pays, de planter les 
cafeiers sous des arbres, e'est la plus sur moyen de propager la 
maladie. 
Hemileia, Berk, and Broome (emended). 
I. (Aecidium stage). Unknown. 
II. (Uredo stage). Forming effused pulverulent, orange patches 
on the under surface of living leaves, or on young shoots and 
fruit ; uredospores grouped in small heads or clusters, produced at 
* C. Roumeguere Fung. Sel. Exs., No, 4,500. 
