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<br /> AQUATIC INSECTS OF THE ARKANSAS RIVER BASIN IN COLORADO <br />DATE July 23, 1974 SAMPLE NO. 50 <br />COLLECTION SITE Cottonwood Creek, below Buena Vi sta, at bridge <br />ORDER FAMILY GENUS SPECIES NO. I ND I V IDUALS <br />Diptera Tendipedidae 2 <br />Diptera Simuliidae 70 <br />Trichoptera Brachycentridae Brachycentrus 4 <br />Di ptera Tipulidae Antocha 1 <br />Diptera Ti pul i dae Hexatoma 2 <br />Ephemeroptera Heptageniidae Epeorus (Ironopsis) grandi s 1 <br />Ephemeroptera Baetidae Baetis 4 <br />Ephemeroptera Ephemerellidae Ephemere 11 a mi cheneri 5 <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br /> <br />. <br />