. Bulletin. Natural history; Natural history. Fi4. Leuctra occidentalis: A from Oregon, B from Montana, C from California. Fig. 22.—Leuctra purcellana from Prairie Hills, British d" Cercus. 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