. Bulletin. Natural history; Natural history. Fall and Wixteu Stoneflies ADULTS Male with a globular appendage on ninth abdominal sternite (subgenital plate); female with portion of eighth abdominal sternite (Figure 76) anterior to genital opening darkly chitinized nivalis (Fitch) Male without a globular appendage on ninth abdominal sternite; female with portion of eighth abdominal sternite (Figure 77) anterior to genital open- ing not darkly chitinized, at most with anterior border of genital open- ing dark colored, contrasting with membranous area parvula Banks. Figs. 17-20. :daxillae of nym
. Bulletin. Natural history; Natural history. Fall and Wixteu Stoneflies ADULTS Male with a globular appendage on ninth abdominal sternite (subgenital plate); female with portion of eighth abdominal sternite (Figure 76) anterior to genital opening darkly chitinized nivalis (Fitch) Male without a globular appendage on ninth abdominal sternite; female with portion of eighth abdominal sternite (Figure 77) anterior to genital open- ing not darkly chitinized, at most with anterior border of genital open- ing dark colored, contrasting with membranous area parvula Banks. Figs. 17-20. :daxillae of nymphal males: 17, Taenioptenjx nivalis (Fitch); 18, Stroijhoptcnjx fasciata (Burmeister); 19, Allocaimki vivipara (Claassen) ; 20, Leuctra claasseni Frison. «. lacinia; b. galea; c, subgalea; d. maxillary palpus; e. stipes; /. palpifer; g, 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 Illinois. Natural History Survey Division. Urbana, State of Illinois, Dept. of Registration and Education, Natural History Survey Division
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Keywords: ., booka, bookcentury1900, bookdecade1910, booksubjectnaturalhistory
