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Abstract
This bark-feeding aphid was first described by Harris (1841) as Aphis caryae from pignut hickory, Carya glabra (= porcina) (Mill.) Sweet, in Massachusetts. It is the largest aphid that occurs in the United States, and it was probably this species that was reported by Thomas (1879) from limbs of pignut hickory in Illinois. Weed (1891) described its various forms and gave a short note on its biology. Wilson (1909) described the genus Longistigma for this species because of the extremely long slender stigma which extends around the end of the wing. This document is EENY-292 (originally published as DPI Entomology Circular 212), one of a series of Featured Creatures from the Entomology and Nematology Department, Florida Cooperative Extension Service, Institute of Food and Agricultural Sciences, University of Florida. Published: June 2003. Revised: May 2004.
References
Barnard EL, Dixon WN. (October 1983). Giant bark aphid. Insects and Diseases: Important Problems of Florida's Forest and Shade Tree Resources. http://www.fl-dof.com/Pubs/Insects_and_Diseases/insects_hbs_giant_bark_aphid.htm (9 June 2003).
Harris TW. 1841. A Report on the Insects of Massachusetts, Injurious to Vegetation. (1842 Reprint: A Treatise on Some of the Insects of New England, Which are Injurious to Vegetation. Cambridge), 459 p. https://doi.org/10.5962/bhl.title.8976
Mueller CW. (March 2002). Giant bark aphids. Horticulture Update. http://aggie-horticulture.tamu.edu/extension/newsletters/hortupdate/mar02/art2mar.html (9 June 2003).
Thomas C. 1879. Eighth report of the state entomologist on the noxious and beneficial insects of the State of Illinois. Third Annual Report, 212 p.
Weed CM. 1891. Fifth contribution to a knowledge of certain little-known Aphididae. Insect Life 3: 285-293.
Wilson HF. 1909. Notes on Lachnus caryae Harris under a new name. Canadian Entomologist 41: 385-387. https://doi.org/10.4039/Ent41385-11
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