. Bulletin - New York State Museum. Science. AQUATIC INSECTS IN NEW YORK STATE 259' ISCHNURA This cosmopolitan genus contains a few very common and; widely distributed and well known species. I include three in this paper, one of which I. p o s i t a , has been referred hitherto-. Fig. 12 Labia of Enallagma and Ischnura; a and b, labium ofE. siguatum; c and (2, 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. Please note that these ima
. Bulletin - New York State Museum. Science. AQUATIC INSECTS IN NEW YORK STATE 259' ISCHNURA This cosmopolitan genus contains a few very common and; widely distributed and well known species. I include three in this paper, one of which I. p o s i t a , has been referred hitherto-. Fig. 12 Labia of Enallagma and Ischnura; a and b, labium ofE. siguatum; c and (2, 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. 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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