The black fly of citrus and other subtropical plants . Fig. 2.—Distribution of the black fly in the West Indies. watching for it. Therefore it is safe to assume that the black flydoes not occur there at the present time. In his trip to the VirginIslands in 1917, Morrison did not find it at any places visited by him. Fig. 3.—Distribution of the black fly in Cuba. on the islands of St. Croix, St. John, or St. Thomas. Neither did hefind it in Porto Rico in his inspections that year. In 1919, Zetek (37) records for the first time the occurrence of theblack fly in Costa Rica, having found it in the
The black fly of citrus and other subtropical plants . Fig. 2.—Distribution of the black fly in the West Indies. watching for it. Therefore it is safe to assume that the black flydoes not occur there at the present time. In his trip to the VirginIslands in 1917, Morrison did not find it at any places visited by him. Fig. 3.—Distribution of the black fly in Cuba. on the islands of St. Croix, St. John, or St. Thomas. Neither did hefind it in Porto Rico in his inspections that year. In 1919, Zetek (37) records for the first time the occurrence of theblack fly in Costa Rica, having found it in the vicinity of Limonand as far inland as Peralta, on the Northern Railroad. The maps show the distribution of the black fly in the world (fig. 1),in the West Indies (fig. 2), and in Cuba (fig. 3). 6 BULLETIN 885, U. S. DEPARTMENT OE AGRICULTURE. In the Canal Zone this insect has been found at Cristobal, MountHope, Gatun, Frijoles, Pedro Miguel, Miraflores, Corozal, Balboa,Palo Seco, and Ancon, and in the Republic of Panama it has beenfound in Colon, Panama (including the suburbs), the Las Sabanasregion north of Panama as far as Rio Bajo, Panama Vieja (OldPanama), and Taboga Island. It was not found at the large citrusplantation at Juan Mina, or at Limon, Summit, Las Cascadas,Empire, Gamboa, Venado, Bracho, M
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