138 EUCALYPTUS. 



"cienegas," to produce malaria if something else essential 

 for its life were not absent. 



In Queensland and generally in the tropical parts of 

 Australia malarial fevers are quite prevalent and so, also, 

 are largety represented considerable numbers of species of 

 Eucalyptus ; not, however, those named. 



Those species of Eucalyptus found in Queensland are 

 in an appendix. It is by no means certain that malaria 

 is found where each of these species grow. It is, how- 

 ever, absolutely certain that various species of Eucalyptus 

 and malignant malaria can exist together. 



The Eucalypti that have been at all popular in Cali- 

 fornia that are native to Queensland and North Australia 

 are Eucalyptus pilularis, Eucalyptus sideroxylon, Euca- 

 lyptus hemiphloia, Eucalyptus siderophloia, Eucalyptus 

 maculata, Eucalyptus rostrata, Eucalyptus tereticornis, Eu- 

 calyptus resinefera and Eucalyptus robusta. There are 

 others like Eucalyptus corymbosa, Eucalyptus paniculata, 

 Eucalyptus crebra, Eucalyptus hsemastoma, etc., which 

 may prove valuable to us when better known. 



The Eucalypti have been extensively planted in Corsica r 

 Italy, Algiers, India, the South of France, Spain, Cali- 

 fornia and in a smaller way in England and its outlying 

 islands, in the Argentine, Mauritius, Zanzibar, Cuba, Spain,. 

 Cape Colony, and by the Russians east of the Caspian Sea. 

 In Corsica, Italy, and in Algiers the planting of Euca- 

 lyptus, mainly Eucalyptus globulus, has been generally fol- 

 lowed by or happened with marked improvement in the 

 local health, especially as to malaria. ' 



I have not been able to check up the conditions before 

 and after the Eucalyptus planting. Nearly every case of 

 Eucalyptus planting and better health was accompanied by 



