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<br />AQUATIC INSECTS OF THE ARKANSAS RIVER BASIN IN COLORADO <br /> <br />DATE June 27, 1974 <br /> <br />COLLECTION SITE Grape Creek, Westcliff Sewage Treatment Site, riffle <br /> <br />ORDER FAMILY GENUS SPECIES <br />Ephemeroptera Baetidae Baetis <br />Ephemeroptera Tricorythidae Tricorythodes <br />Ephemeroptera Heptageniidae Hepta geni a <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />SAMPLE NO. 22 <br /> <br />NO. INDIVIDUALS <br /> <br />4 <br />21 <br />20 <br /> <br />. <br /> <br />. <br /> <br />. <br />