1.A malaria survey of the southern territory of the peninsula of Lower California reveals endemic malaria (P. vivax) in the towns of Mulegé, Santiago, San José del Cabo and Todos Santos. In 805 children examined, the spleen rate was 19.3 and the parasite rate 7.8.
2.Anopheles pseudopunctipennis var. typicus is the sole anopheline and the vector of malaria in the region.
3.Control of malaria by DDT residual spraying of dwellings is recommended.
4.Eradication of anophelines would be a possibility in the regions visited.