. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). Fig. 12 Labia of Enallagma and Ischnura; a and b, labium ofE. signatum; c and d, of I. v e r t i c a 1 i s to Nehallennia. The one reason for referring it to Nehallen- nia, the absence of a spine on the apex of the sternum of the- eighth abdominal segment in the female, appears not to be a. Fig. 13 Eggs of Ischnura verticalis good one, since a number of species are now referred to Ischnura lacking that spine. Ischnura and Enallagma are not very sharply defined from each

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. Annual report. New York State Museum; Science -- New York (State); Plants -- New York (State); Animals -- New York (State). Fig. 12 Labia of Enallagma and Ischnura; a and b, labium ofE. signatum; c and d, of I. v e r t i c a 1 i s to Nehallennia. The one reason for referring it to Nehallen- nia, the absence of a spine on the apex of the sternum of the- eighth abdominal segment in the female, appears not to be a. Fig. 13 Eggs of Ischnura verticalis good one, since a number of species are now referred to Ischnura lacking that spine. Ischnura and Enallagma are not very sharply defined from each other, and this troublesome species stands in some respects intermediate in characters between the. 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; University of the State of New York. Albany, N. Y. : University of the State of New York

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Keywords: ., boo, bookauthornewyorkstatemuseum, booksubjectnewyorkstatemuseum