. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. The Black-Walnut Curculio. a, Egg in natural position exposed by removing skin of young black walnut; 6, group of egg punctures in half-grown black'walnut; c, parasitic fly Cholomyia lonc/ipes; d, pupae within pupal cells in earth; e, cocoons of the parasite Thehilochus conotracheli occupying the pupal cells of the curculio after killing and devouring the host larvae. All enlarged.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration an

. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. The Black-Walnut Curculio. a, Egg in natural position exposed by removing skin of young black walnut; 6, group of egg punctures in half-grown black'walnut; c, parasitic fly Cholomyia lonc/ipes; d, pupae within pupal cells in earth; e, cocoons of the parasite Thehilochus conotracheli occupying the pupal cells of the curculio after killing and devouring the host larvae. All enlarged.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration an Stock Photo

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. Bulletin of the U.S. Department of Agriculture. Agriculture; Agriculture. The Black-Walnut Curculio. a, Egg in natural position exposed by removing skin of young black walnut; 6, group of egg punctures in half-grown black'walnut; c, parasitic fly Cholomyia lonc/ipes; d, pupae within pupal cells in earth; e, cocoons of the parasite Thehilochus conotracheli occupying the pupal cells of the curculio after killing and devouring the host larvae. All enlarged.. 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 work.. United States. Dept. of Agriculture. [Washington, D. C. ?] : The Dept. : Supt. of Docs. , G. P. O.

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