16 REPORT OF SEAECH FOE ENEMIES OF CITRUS WHITE FLY. 
The month of August was spent in southern Spain, chiefly at Malaga 
and Valencia in company with Comte de Montomes, Royal Commis- 
sioner of Agriculture to the Province of Valencia, and Leopoldo Salas, 
Agricultural Engineer to the Province of Malaga. During this time 
the equipment essential in fumigation was acquired until a crew was 
properly fitted for field work. Demonstration work was then carried 
on in training the crew until it had become familiar with the general 
procedure of fumigation. Meanwhile experimental work was being 
carried on, the results of which furnished a basis for dosage against 
the insects treated. 
Abundant opportunity was found during this demonstration to 
study the insect pests of citrus trees in different parts of the country. 
Fig. 1.— Map showing present known world distribution of the citrus white fly (Aleyrodes citri). 
(Original.) 
The citrus white fly, however, could not be found in Spain. From 
Spain the writer continued to Italy and Sicily and these countries 
were searched but failed to reveal the presence of Aleyrodes citri; 
nor has this insect ever been found in European orchards. Thus 
the great citrus belt of Europe, although beset with many injurious 
insect pests, most of which are mentioned in the appendices of this 
bulletin, has not yet become infested with this particular menace, 
the citrus white fly, which has proven so discouraging to the orchard- 
ists of Florida. 
INVESTIGATIONS IN CEYLON. 
Leaving Naples, direct passage was taken to Ceylon, which was 
reached September 30. Citrus fruits are not grown commercially 
in Ceylon, their production being confined to scattering trees, in 
yards and gardens, and are grown for decorative purposes as well 
as for fruit. Orange trees do not appear to grow with much vigor 
