Table 1. Mosquito sampling sites from EEE virus foci across eastern North America.

ID	County/Admin. Region	State/Province	Regiona	Libraryb
1-CAN	Montréal	Quebec, CAN	Northern	2
2-ME	York	Maine, USA	Northern	1
3-NH	Rockingham	New Hampshire, USA	Northern	3
4-VT	Rutland	Vermont, USA	Northern	5
5-NY	Oswego	New York, USA	Northern	3
6-MA	Plymouth	Massachusetts, USA	Northern	4
7-CT	Middlesex	Connecticut, USA	Northern	4
8-NJ	Cape May	New Jersey, USA	Mid-Atlantic	1
9-VA	Suffolk	Virginia, USA	Southern	2
10-FL	Volusia	Florida, USA	Southern	5

^a Region refers to the geographic region mentioned in the text (see Methods).

^b Library refers to locations that were pooled in the same sequencing lane (see Methods).