>Anopheline mosquitos are native to the Lower Columbia River and
>Willamette Basins and it was an outbreak of malaria fanning out from the
>Hudson's Bay Company post at Ft. Vancouver beginning in 1830 that kill a
>conservatively estimated 90% of the Native American populations of these
>regions between 1830 and 1834.
>
>Gene Hunn.

But the mosquitos that cause avian malaria are different species of
Anopheles, so there's still a question of *their* distribution. Human
malaria mosquitos were of course common in eastern U.S., where they had
considerable effect north along the coast at least to Maryland (Washington,
DC, was famous as a "malarial swamp"). I don't have any more info on that
(and I apologize for going a bit far afield).

Dennis Paulson, Director phone: (206) 756-3798
Slater Museum of Natural History fax: (206) 756-3352
University of Puget Sound e-mail: dpaulson at ups.edu
Tacoma, WA 98416