• Los simúlidos y su relación con la oncocercosis humana en Venezuela septentrional 

      Lewis, D. J; Ibañez de Aldecoa, R (‎1964)‎
      During a study carried out near San Antonio de Maturín, Venezuela, 12 Simulium forms were encountered, among which Simulium exiguum was abundant but of uncertain relation to onchocerciasis. As opposed to S. metallicum, which has its breeding places almost exclusively in small streams, S. exiguum breeds in big streams. In neither species is it possible to distinguish nuliparous and parous females from the size of their organism so it is necessary to examine the ovaries. During the rainy season pupae are swept away and the S. metallicum population ...