Field experiments were conducted during 1972 and 1973 to ascertain and quantify certain insect-pest migrations from alfalfa to soybeans after alfalfa cutting. Twelve soybean-alfalfa complexes were established and sampled before and after cutting. During 1972 theEmpoasca fabae(Harris) migration into soybeans, following alfalfa cutting, was detected only in the border rows of the cut complexes, but was observed throughout the plots in 1973. Inadequate numbers ofLygus lineolaris(Palisot de Beauvois) andAldelphocoris lineolatus(Goeze) were collected during 1972 to evaluate treatment effects. During 1973L. lineolaris(nymphs and adults) migration was restricted to the soybean border rows, andA. lineolatus(adults) migration occurred throughout the soybean plot.