6 
BULLETIN 885, U. S. DEPARTMENT OE AGRICULTURE. 
In the Canal Zone this insect has been found at Cristobal, Mount 
Hope, Gatun, Frijoles, Pedro Miguel, Miraflores, Corozal, Balboa, 
Palo Seco, and Ancon, and in the Republic of Panama it has been 
found in Colon, Panama (including the suburbs), the Las Sabanas 
region north of Panama as far as Rio Bajo, Panama Vieja (Old 
Panama), and Taboga Island. It was not found at the large citrus 
plantation at Juan Mina, or at Limon, Summit, Las Cascadas, 
Empire, Gamboa, Venado, Bracho, Mindi, Toro Point, France Field, 
or Coco Solo in the Canal Zone, or at Pueblo N'euvo, Matias Hernan- 
dez, Arraijan, Chorrera, Chepo, Pecora, or Almirante (Bocas del 
Toro region) in the Republic of Panama, at all of which points in- 
spections have been made by the authors or by Ignacio Molino. 
Fig. 4.— Distribution of the black fly in the Canal Zone and adjoining parts of the Republic of Panama. 
The map (fig. 4) shows the distribution of this pest in the Canal Zone 
and adjoining parts of the Republic of Panama. 
The hosts on which Aleurocanihus woglumihsLS been found in various 
parts of the Old and New Worlds will be found under the heading, 
"Food plants," page 14. 
SPREAD OF THE INSECT IN THE NEW WORLD. 
Ashby (3) says that Aleurocanthus woglumi "was probably brought 
here [Jamaica] on mango cuttings from India within the last 20 
years." Morrison, after his investigation of conditions in Jamaica, 
believes that "the pest has been introduced certainly within 10 years 
or even as late as 1910." There is no question that the insect was 
first introduced into Jamaica from India either on mango or some 
other host, and that from this focus in the New World it has spread 
to Nassau, New Providence, Bahama, the Guantanamo and Santiago 
de Cuba regions of Cuba, and the Canal Zone. The actual time of 
its introduction into any of these localities has not been determined. 
