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Show 16 piece 9f fine-mesh copper six inch bottom the flow washed the of water the hand of face is collections from rocks of with drift forceps. nets. remain in the made were over the specimens drifting in Forest Service obtained by For are a waters the and bottom. hand screen to be used, by hand-picking individual nymphs Another productive method is various current. mesh 1s the allowed to periods of time to collect The of majority the was method. each of the information that has biological data. hand sub collection from Salmon National Forest this the pan where white the water Here, netting of fine stream the several minutes In lentic the With screen. After the The stream-bed with specimens moving it through places too small for In use the emptied into seen. merged vegetation while stirring many of thirty dowels. the against screen. easily used by be may the screen be organisms may screen held the against downstream onto content is screen upstream stirring the bottom, collector the of edge inch diameter three-fourths long, two between bolted screen The localities been recorded form used in I have for collected aid in certain compiling illustrated in Figure 2. Rearing Techniques The use of nature of this investigation adequate rearing techniques as, did not of permit the necessity, a large |
