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Note on the Breeding of Aedes (Taeniorhynchus) Fluviatilis, Lutz, in Artificial Water-Deposits^1,

Dyar (1) describes Aedes (Taeniorhynchus) fluviatilis, Lutz, as a rock-hole breeder. This is confirmed by Shannon (2), who names "stream-bed rockpools" as the place where its larvae are to be found. Shannon does not report the capture of A. fluviatilis in houses.

When mosquito larvae from the Valle do Chanaan, Espirito Santo, Brazil, were being classified, larvae of Aedes fluviatilis were found among specimens which had been obtained by Drs. Caio Manso and J. Pinheiro from cement ant-rings at two points, Corrego Secco and 15 de Agosto, several kilometers apart. Dr. A. da Costa Lima of the Oswaldo Cruz Institute confirmed the classification. Adults of the same species were captured inside one of the homes from which larvae were received.

In Corrego Secco the ant-rings harboring larvae were broken and left without water for four weeks. They were then mended and refilled with water. Fourteen days later, larvae of A. fluviatilis were again found in these ant-rings.

¹ The observations on which this report is based were made under the auspices of the Cooperative Yellow Fever Service maintained by the Brazilian Government and the Rockefeller Foundation.

² Subsequent to the preparation of this note, numerous mixed foci of Aedes fluviatilis, Lutz, and Aedes aegypti, Linn., were observed by Dr. J. Serafim, Jr., at Muritiba, State of Bahia, Brazil. The most common deposit showing Aedes fluviatilis was the clay ring containing water, used to protect plants and shrubs from ants. However, occasionally clay jars and even barrels were incriminated. House captures in Murutiba failed to reveal any tendency on the part of Aedes fluviatilis to invade houses.