Two sympatric leafhopper species,Erythroneura aclys(McAtee) andE. bistrata(McAtee), occur together in some Kentucky settings in high numbers on eastern redbud trees,Cercis canadensisL. Seasonal and spatial distributions were examined to determine whether the species segregate within their habitat. Both leafhopper species undergo two generations per year, and population densities peaked within a week of each other in both generations.E. aclyswas the more abundant of the two species. Leafhoppers partially subdivided tree canopies:E. aclysoccurred significantly more frequently in the lower than in the upper canopy.E. bistratashowed less preference for either canopy level, but on average was encountered in greater numbers in the upper canopy. Both species preferred newer leaves along branches, butE. aclysshowed significantly greater preference thanE. bistrata, especially in the lower canopy.E. bistratachanged its resting or feeding position on individual leaves when it was in the presence ofE. aclys. In general, differential distribution among and within trees increased as density increased, but only a change in position byE. bistratawithin leaves whenE. aclyswas present was clearly the result of interspecific interactions.