Asian Longhorned Beetle (ALB), Anoplophora glabripennis, is among high risk invasive species that invaded the U.S. from China. ALB has attacked 25 deciduous tree species in 13 genera in North America, most notable seven maple (Acer) species. Methods developed for control of A. glabripennis include the removal of infested trees and the use of systemic and contact insecticides. However, alternative environmentally compatible biological control methods are desired. Of particular interest are biological control agents that possess high host searching ability, particularly under low pest population levels and within species rich landscapes. Focus is also on egg and early larval instar life stages of A. glabripennis. Investigations of the native natural enemies of the native cerambycid fauna in North America were initiated at the ARS Beneficial Insects Introduction Research Lab (BIIRU) in 2001.These studies focus on species rich landscapes under low cerambycid population pressure. The objectives of these studies include: (1) to identify and determine the relative abundance and seasonal occurrence of native cerambycids and associated natural enemy fauna infesting tree species in the Mid-Atlantic states. Focus is on red maple (Acer rubrum) and other species at risk. (2) To determine the effects of stress on the relative abundance and seasonal occurrence of native cerambycids and natural enemy fauna. Stress was induced at three levels: half-girdled trees (girdled 180°around the circumference); fully-girdled trees (girdled 360°around the circumference) and felling. (3) To evaluate the efficacy of the native natural enemy fauna to parasitize A. glabripennis within infested bolts in quarantine at BIIRU.