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<br />AQUATIC INSECTS OF THE ARKANSAS RIVER BASIN IN COLORADO <br /> <br />DATE June 27, 1974 <br />COLLECTION SITE Grape Creek, above Westc1iff, fast water <br /> <br />ORDER FAMILY GENUS SPECIES <br />Ephemeroptera Ephemene 11 i dae Ephemere11a <br />Ephemeroptera Tri corythi dae Tricorythodes <br />Ephemeroptera Heptageniidae Heptagenia <br />Ephemeroptera Baetidae Baetis <br />Trichoptera Hydropsychi dae Hydropsyche <br />Hemi ptera Nauconidae Ambrysus <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />SAMPLE NO. 20 <br /> <br />NO. INDIVIDUALS <br /> <br />21 <br />2 <br />26 <br />6 <br />3 <br />1 <br /> <br />. <br /> <br />. <br /> <br />. <br />