Fine structure of the tip of the labellar taste hair of the blow flies,Phormia regina (Mg.) and Calliphora vicina R.-D. (Diptera,Calliphoridae) |
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| Authors: | Dr B Stürekow P E Holbert J R Adams R J Anstead |
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| Institution: | (1) Department of Biology, Northeastern University, 02115 Boston, Mass., USA;(2) The Holbert Electron Microscopy Laboratory, 07028 Glen Ridge, N. J., USA;(3) USDA, Agricultural Research Service, Insect Pathology Laboratory, 20705 Beltsville, Maryland, USA;(4) The NASA Goddard Space Flight Center, 20771 Greenbelt, Maryland, USA |
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| Abstract: | Summary The labellar taste hairs of the blow flies, Phormia regina and Calliphora vicina, have an opening mechanism at the tip which consists of two stump cuticular prongs and a funnel-like cuticular pouch. Opening and folding of these structures are regulated by the pressure within the dendrite-free lumen of the hair. The extrusion of viscous substance at the tip of the taste hair is possible through spongy cuticle and one pore in each prong; it seems likewise to depend on the pressure within the dendrite-free lumen and results in regional collapsing of this lumen. Described and discussed are: The cuticle and pores of the structures at the hair tip, pore filaments which extend from the dendrites, and the number and arrangement of the dendrites.This work was supported by a grant from the 7USDA, Entomology Research Division, Beltsville, Md., and the grant GB-13500 from the National Science Foundation.We thank Dr. J. F. Worley, USDA, Plant Science Research Division, Beltsville, Md., for his collaboration in fluorescence microscopy. |
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