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Differences in Host Choice between the Sibling Species of Treehole Mosquitoes Aedes Triseriatus and Aedes Hendersoni^*

Adult treehole mosquitoes were collected by vacuum-sweeping of vegetation in urban, suburban, and rural woodlots in northern Indiana. The sibling species Aedes triseriatus and Ae. hendersoni were identified by polyacrylamide gel electrophoresis. Blood meals were identified by the modified precipitin method. Ae. triseriatus fed predominantly on chipmunks and deer, and Ae. hendersoni fed mainly on tree squirrels and racoon. The relative rates of feeding on the major hosts were variable depending on the location of collection, and probably reflected differences in host density. No blood-feeding on humans was detected.

Accepted for publication September 17, 1981.

^* Supported by NIH Grant Nos. AI06123, AI07030, and AI02753.