Elementary entomology ([c1912]) Elementary entomology . elementaryentomo00sand Year: [c1912] FIG. 167. Periodical cicada , young nymph (enlarged); r, cast skin of full-grown nymph; d, side view of female to show beak, c, and ovipositor, /. (Natural size except b.) (After Marlatt and Riley, United States Department of Agriculture)

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