. Zoology : for students and general readers . Zoology. PLANT LICE. 371 most, the seventeen-year locust {Cicada septemdecim Linn., Fig. 336) lives over sixteen years as a larva, finishing its transformations on the seventeenth ; there is also, accord- ing to Riley, a thirteen-year variety of this 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 Packard, A. S. (Alpheus Spring), 1839-1905. New York : Henry Holt

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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1879