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<br />AQUATIC INSECTS OF THE ARKANSAS RIVER BASIN IN COLORADO <br /> <br />DATE June 12, 1974 <br /> <br />SAMPLE NO. 4 <br /> <br />COLLECTION SITE Rocky Ford Sewage Treatment Ditch into Lower Arkansas River, below discharge <br /> <br />ORDER FAMILY GENUS <br />Ephemeroptera Heptageniidae Heptagenia <br />Ephemeroptera Baeti dae Baeti s <br />Amphipoda Talitridae Hyalella <br />Oi ptera Simul i idae <br /> <br />SPECIES <br /> <br />NO. INDIVIDUALS <br /> <br />azteca <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />12 <br />6 <br />1 <br />1 <br /> <br />. <br /> <br />. <br />