1.A malaria reconnaissance of the State of Veracruz was conducted during the years 1944–1946, inclusive. The zone as a whole can be characterized as one of moderate malarial endemicity.
2.Evidence is presented to indicate that the zones most favorable for malaria transmission are those below an altitude of 1,000 meters. Falciparum malaria occurs relatively less frequently than vivax malaria with increase in altitude.
3.Twelve species of anophelines were encountered, of which A. albimanus, A. pseudopunctipennis and A. quadrimaculatus are probably the most important in the transmission of malaria. Adequate studies for the determination of the malaria vectors have not been made.
State Health Officers, Jalapa, Veracruz.
State Health Services, Veracruz.
State Entomologist, Veracruz.
Malaria Campaign, Mexico, D.F.
The authors wish to thank Dr. Mark F. Boyd, and Dr. George C. Payne of the International Health Division of The Rockefeller Foundation, for their constant help in organing and developing this reconnaissance, and Dr. Wilbur G. Downs of the International Health Division for his help in the later course of the reconnaissance and the preparation of this paper in English. Dr. Salvador González Herrejón, Dr. Samuel Benitez Armas and Dr. Galo Soberón y Parra of the office of the Malaria Campaign merit special thanks for the constant support and interest they have given this program.