Two mosquito species, Culex (Culex) hepperi and Culex (Culex) maxi are reported for the first time for Bolivia, in Tarija department. Aedes (Ochlerotatus) stigmaticus and Mansonia (Mansonia) indubitans are the first records in Aniceto Arce province, in Tarija department, southern Bolivia. In addition, Aedes (Protomacleaya) alboapicus and Culex (Phytotelmatomyia) renatoi are reported for the first time in the northwestern region of Argentina. Anopheles (Nyssorrhynchus) nuneztovari s.l. is reported for the first time in Jujuy and Tucumán provinces, and Aedes (Ochlerotatus) raymundi and Anopheles (Anopheles) neomaculipalpus are the first reports in Tucumán province. The 3 species are extending their geographical distribution in these provinces. Data on the collection localities and comments about the medical relevance of some species are also presented.
Keywords: Culicidae; South America; distribution; mountainous rainforest.
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