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<br /> TABLE A-4 <br /> DENSITIES (No. /f t2) AND PERCENT RELATIVE ABUNDANCES (%RA) OF BENTIIIC <br /> MACROINVERTEBRATES COLLECTED 8Y SURB ER SAPIPLER AT STATION 1 <br /> IN TIDi WILLIAPIS FORK RIVER NEA R CRAIG, COLORADO <br /> JUNE 10, 1981 <br />Taxa Rep 1 Rep 2 Rep 3 Rep 4 ~1ean °,6RA S.D. <br />Ephemeroptera <br />Baetidae <br />Baetis sp. 1 2 0.6 ]0.3 0.9 <br />Ephemerellidae <br />Ephemerella sp. 3 1 1 1.3 22.4 ].3 <br />Heptageniidae <br />y Heptagenia sp. 1 0.2 3.4 0.5 <br />,o Rithrogena sp. 4 1 1.3 22.4 1.9 <br />Tricorythidae <br />Tricorythodes s p. 2 1 1 1.0 17.2 0.8 <br />Plecoptera <br />Perlodidae <br />Isoperla sp. 1 0.2 3.4 0.5 <br />Hemiptera <br />Corixidae <br />Si ara sp. 2 0.5 8.6 1.0 <br />Trichoptera <br />Hydropsychidae <br />Cheuma[opsyche sp. 1 1 0.5 B.6 0.7 <br />Coleoptera <br />Elmidae <br />Hicrocylloepus sp. 1 0.2 3.4 0.5 <br />