HISTOCHEMICAL STUDIES ON LOCALIZATION AND DISTRIBUTION OF ESTERASES IN THE SALIVARY GLANDS OF THE LARGE MILKWEED BUG, ONCOPELTUS FASCIATUS (DALL.) (HEMIPTERA: LYGAEIDAE)

Abstract

The posterior lobe of the salivary glands of the large milkweed bug, Oncopeltus fasciatus (Dall.), was rich in a nonspecific esterase. An esterase was also localized in the epidermal cells of the tracheae and body wall and in the epithelial cells of the first part of the mid-gut. No true lipase was found in the salivary glands or in the head or thorax.