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The biting rate of Triatoma infestans in Argentina

Abstract. 1 The daily proportion of fed individuals in a population of the reduviid bug Triatoma infestans (Klug), maintained under natural climatic conditions in experimental chicken houses in central Argentina, was estimated from the proportion of bugs retaining colourless urine in the rectum. 2 From the estimates of feeding frequency throughout a 1 year period, it was shown that temperature has a dominant effect on biting rate, but density‐dependent effects became apparent during the warmest months. 3 These and other data on the determinants of blood consumption by T.infestans, were incorporated into a detailed hypothesis of density regulation in this species.