Parasitic Hymenoptera caught on colored sticky panels placed in various forest microhabitats showed patterns of trap catch that could often be related to the hosts they attack. Parasites caught predominately on yellow panels, which mimic foliage, generally attack foliage-frequenting insects such as leaf-chewers or leaf-miners. The few parasites that did not respond predominately to yellow panels attack such hosts as psocids or eggs of stem- or pod-boring Lepidoptera. The observed correlations between patterns of trap catch and host preferences suggest that sticky panels may be useful in revealing host and microhabitat preferences of little-known parasites.