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Encephalitis on Taiwan^*

II. Mosquito Collection and Bionomic Studies

Stephen M. K. Hu AND J. Thomas Grayston

Three stations—one in the north, one in the south, and one central—were established on Taiwan to collect mosquitoes for studies of the vector of Japanese encephalitis virus. Both Magoon traps and light traps caught only small numbers of mosquitoes. To obtain large numbers it was necessary to collect individually from cattle tethered outdoors. Most mosquitoes were collected during the first two hours after sunset. Culex tritaeniorhynchus was the predominant mosquito species collected with animal bait in northern Taiwan. Culex fuscocephalus was the predominant species in the south. A variety of other species were caught with different seasonal incidence. The results with various collection methods are presented.

^* This work was supported in part by contract Nonr-2121(07) between the Office of Naval Research and the University of Chicago, and in part by funding under Public Law 480, Section 104(c). The opinions and assertions contained herein are those of the authors and are not to be construed as official or reflecting the views of the Navy Department or the Naval Service at large.

Present address: United States Operation Mission, Nepal.

Present address: Department of Preventive Medicine, University of Washington, Seattle 5, Washington.