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population dynamics of the valley elderberry longhorn beetle at the compensation sites. The following should be analyzed for the beetle: estimated population size (using both open and closed population models) and spatial distribution. Maps showing where the individual adult beetles and exit holes were observed should be included. For the elderberry shrubs and associated native plants, the following should be analyzed: the survival rate, condition and size of the plants. Real and likely future threats should be addressed along with suggested mitigations (e.g., fencing access to off-road vehicles, more frequent removal of exotic vegetation, etc.). The original field notes,photographs,correspondence and all other pertinent material, as well as a copy of the report should be deposited and accessioned into the Natural History Museum of Los Angeles County (Senior Curator,Entomology Section, Natural History Museum of Los Angeles County, 900 Exposition Blvd.,Los Angeles, California 90007) by December 31 of each year for a ten year period beginning with the date the mitigation program is initiated. The Sacramento Field Office should be provided with the accession numbers given to this material by the Natural History Museum of Los Angeles County. Success Criteria A survival rate of 80% of the elderberry shrubs and associated native plants should be obtained at the end of the ten year monitoring program. The Service will make the determination as to the compensator's replacement responsibilities arising from circumstances beyond its control such as plants damaged or killed as a result of severe flooding or vandalism. Future Revisions Revegetating with elderberries and the responses of the beetles to such revegetation efforts is a relatively new procedure. As data becomes available on which to evaluate this technique, revisions to these guidelines are anticipated. 10