80 



Day: Ephemeroptera 



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Fig. 3:1. Ameletus amador, adult. (V. K. Mayo, 1939.) 



window screen of two-foot width, and a one and one- collector faces upstream, rests one three-foot edge 

 quarter inch square strip of hardwood twenty-seven of the screen on the bottom and rests the other three- 

 inches in length fastened at each twenty-four-inch foot edge across his knees, permitting the center pari 

 end, the strips extending about one and one-half of the screen to sag more or less downstream. The 

 inches beyond the edges of the screen. collector, leaning over the screen and reaching up- 

 Wading into the water with or without boots, the stream, lifts rocks from the bottom to inspect foi 



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