Human biting rate by month and season in indoor, peridomestic, and outdoor areas. (a) Leticia district (Kilometro 14), total person-nights: 6.3 indoors, 7.4 peridomestically, and 4.1 outdoors. (b) Puerto Nariño district (sum of Tipisca and San Juan del Soco), total person-nights: 12.9 indoors, 18.3 peridomestically, and 35 outdoors. (c) Tarapacá district (sum of Santa Lucia, Caña Brava, Puerto Huila and Ventura), total person-nights: 45 indoors, 48.9 peridomestically, and 42.1 outdoors. The number above each bar is that of Anopheles caught. In some months, only one or two of the three districts were included.