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<br />. <br /> <br />. <br /> <br />. <br /> <br />DATE June 28, 1974 <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />AQUATIC INSECTS OF THE ARKANSAS RIVER BASIN IN COLORADO <br /> <br />COLLECTION SITE Upper Arkansas River, across road from Amax, riffle <br /> <br />ORDER <br /> <br />Ephemeroptera <br /> <br />FAMILY <br /> <br />GENUS <br /> <br />SPECIES <br /> <br />Baetidae <br /> <br />Baetis <br /> <br />. <br /> <br />. <br /> <br />SAMPLE NO. 25 <br /> <br />NO. INDIVIDUALS <br /> <br />4 <br /> <br />. <br /> <br />...... <br />en <br />w <br />OJ <br />