3:15 METAL CONCENTRATIONS AND INTRACELLULAR DISTRIBUTIONS IN BENTHIC INSECTS NATURALLY EXPOSED TO MINE WASTE.
D.J. Cain¹, W.G. Wallace², and S.N. Luoma¹. ¹U.S. Geological Survey, MS465, 345 Middlefield Rd., Menlo Park, CA 94025, ²Center for Environmental Studies, The College of Staten Island/CUNY, 2800 Victory Blvd., 6S-310, Staten Island, NY 10314

3:30 CADMIUM BOUND TO DIATOM MAT SURFACES: ECOTOXICOLOGICAL RESPONSES OF THE MAYFLY BAETIS TRICAUDATUS.
E.C. Irving¹, D.J. Baird¹, and J.M. Culp². ¹Environment Group, Institute of Aquaculture, University of Stirling, Stirling, FK9 4LA, Scotland., ²National Water Research Institute, Environment Canada, 11 Innovation Boulevard, Saskatoon, Saskatchewan, S7N 3H5, Canada.

3:45 GROWTH OF AN ACID-TOLERANT STONEFLY ON BIOFILM FROM STREAMS OF CONTRASTING PH.
M.E. Ledger and A.G. Hildrew. School of Biological Sciences, Queen Mary and Westfield College, London, E1 4NS, UK.

4:00 EFFECT OF METAL CONTAMINATED PERIPHYTON ON GROWTH AND DEVELOPMENT OF CHIRONOMUS RIPARIUS (DIPTERA: CHIRONOMIDAE).
E.O. Swansburg¹, J.J.H. Ciborowski¹, and W.L. Fairchild². ¹Department of Biological Sciences and Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Ontario, Canada, N9B 3P4, ²Fisheries and Oceans Canada, Gulf Fisheries Centre, Moncton, New Brunswick, Canada, E1C 9B6

4:15 A MULTIVARIATE ANALYSIS OF THE IMPACT OF TRACE METALS ON THE HEAD CAPSULE MORPHOLOGY OF LOTIC MIDGES (DIPTERA: CHIRONOMIDAE).
S.K. Reynolds, Jr.¹ and L.C. Ferrington, Jr.². ¹Department of Biological Sciences, Univeristy of Alabama, Tuscaloosa, AL, USA 35487-0206, ²Department of Systematics and Ecology, University of Kansas, Lawrence, KS, USA 66047

4:30 LIGHT, GROWTH DILUTION, AND PERIPHYTON METAL CONTENT.
W.R. Hill and I.L. Larsen. Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA