. Bulletin - New York State Museum. Science. Fig. 12 Labra of nymphs of Hepta- geninae ; h, of I r o n sp ? from Coy Glen, Ithaca; i, of Rhithrogena elegan- tula ; j, of Ecdyurus maculi- pennis Walsh; k, of Heptagenia interpunctata Say. Fig. 13 Mandibles of nymphs of Hepta- geninae; c, of Rhithrogena elegan- tula Etn, ?; d, of Iron sp? from Coy Glen, Ithaca; e, of Ecdyurus maculi- pennis Walsh; f, of Heptagenia interpunctata Say alcoholic specimens by a longitudinal snip with a pair of fine scissors. They may then be permanently mounted on a slide as microscopic preparations so as to give

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. Bulletin - New York State Museum. Science. Fig. 12 Labra of nymphs of Hepta- geninae ; h, of I r o n sp ? from Coy Glen, Ithaca; i, of Rhithrogena elegan- tula ; j, of Ecdyurus maculi- pennis Walsh; k, of Heptagenia interpunctata Say. Fig. 13 Mandibles of nymphs of Hepta- geninae; c, of Rhithrogena elegan- tula Etn, ?; d, of Iron sp? from Coy Glen, Ithaca; e, of Ecdyurus maculi- pennis Walsh; f, of Heptagenia interpunctata Say alcoholic specimens by a longitudinal snip with a pair of fine scissors. They may then be permanently mounted on a slide as microscopic preparations so as to give a square ventral view. It is from preparations so made that all the figures of the male appendages in this paper have been Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original New York State Museum; New York State Museum. Albany : New York State Education Dept

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Keywords: ., bookcentury1800, bookdecade1880, booksubjectscience, bookyear1887