Abstract
Freshly extracted salivary glands from 18 species of aphids from leaf, bark, and root tissues of their respective host plants were examined without histological fixation. The typical glands were composed of paired principal and secondary lobes, connected by ducts. The size and shape of the principal lobes varied considerably. Attempts to trace the innervation of the glands were not successful because of the small size of the "nerves." The host plant did not appear to influence the size of the glands to the extent found by earlier authors in the species they examined. There was evidence of breakdown of glandular tissue in oviparae and "spent" viviparous females.
Published Version
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