14 spp. (incl. at least 3 adventive) in our area(1)(2)
forecoxae at least four times longer than wide, and extending beyond apex of head; femora, tibiae, and antennae banded black and white; forefemora thickened, elongate; wings slender, extending slightly beyond tip of abdomen
much of the US and so. Canada; many spp. in Eurasia
on foliage or trunks/branches of trees and shrubs
Lattin J.D., Wetherill K. (2001) Five species of Empicoris Wolff from Corylus cornuta and Corylus avellena in Oregon. Pan-Pacific entomologist 77(4): 275-276.