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Triatoma ryckmani Zeledón & Ponce, 1972 is a species found in sylvatic habitat at Central America. Considered rare in the past and poorly studied, nowadays can be found inside houses with potential of dispersal and colonization. All five instars of T. ryckmani are described based on optical and scanning electron microscopy. The postembryonic development of the head analyzed by ontogenetic morphometry showed the largest changes occur in the first three instars. Information about morphology of the immature stages of disease vectors can be helpful in the identification process increasing speed and efficiency of control strategies.

Rhodnius robustus Larrousse, é uma espécie silvestre encontrada na região Norte do Brasil (Acre, Amazonas e Pará), Guiana Francesa, Bolívia, Colômbia, Equador, Peru e Venezuela. Essa espécie tem sido encontrada em domicílios e peridomicílios e já foi observada naturalmente infectada por Trypanossoma cruzi Chagas, Trypanossoma rangeli Tejera e com infecção mista. A partir de observações realizadas em laboratório, foi avaliada a capacidade de voo, correlacionando essa atividade com a quantidade de sangue ingerido, sexo e período de jejum. Apesar da temperatura elevada (33º C), 26% dos insetos não voaram sugerindo a influência de fatores intrínsecos na capacidade de voo de R. robustus. Flight Activity of Rhodnius robustus Larrousse in Laboratory (Hemiptera: Reduviidae: Triatominae Abstract. Rhodnius robustus Larrousse, is a sylvatic species found in northern Brazil (Acre, Amazonas and Pará), Guyana, Bolivia, Colombia, Ecuador, Peru and Venezuela. This species has been found in and around the dwellings, have been data collection of this species naturally infected with Trypanossoma cruzi Chagas, Trypanossoma rangeli Tejera and mixed infections. From observations made in the laboratory, we evaluated the ability of flight, correlating this activity with the amount of ingested blood, sex and fasting period. Despite the high temperature (33º C), 26% of the insects flew suggesting the influence of intrinsic factors in flight capacity of R. robustus. &nbsp