. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. 244 GLOSSINA [CH. second and third segments a curious sense-organ, consisting of a number of sacs lined with sensory epithehum and opening to the exterior by a well-marked pore on the inner surface of the third segment. From the structure of this organ it is supposed to be auditory in function. The arista of the antenna is three jointed, the first two joints being very small, the terminal one broad and compressed, and feathered on its upper side with about 22 or 23 fine branching hairs. The eyes a
. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. 244 GLOSSINA [CH. second and third segments a curious sense-organ, consisting of a number of sacs lined with sensory epithehum and opening to the exterior by a well-marked pore on the inner surface of the third segment. From the structure of this organ it is supposed to be auditory in function. The arista of the antenna is three jointed, the first two joints being very small, the terminal one broad and compressed, and feathered on its upper side with about 22 or 23 fine branching hairs. The eyes are large and in both sexes are well separated ; the anterior facets towards the inner margin are much larger than those Fig. 62. Comparative morphology of the proboscis of Glossina (I), Melo- phagus (II) and Stomoxys (III). B, proboscis bulb ; common salivary duct ; Hvp., hypopharynx ; labella; ; Lah., upper lip (labium); L. inf., lower lip. I. Glossina palpalis; Jl, Melophagus ovinus ; 111, Stomoxys calcitratis ; x 35. (After Roubaud.) The horizontaUy projecting proboscis is strongly chitinized and consists of a bulbous base contracting to a long and very slender shaft. The base of the proboscis, or proboscis bulb, is surrounded posteriorly by a fold of skin forming the hind-wall of the buccal cavity. The proboscis is grooved dorsally to. 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 Hindle, Edward, 1886-. Cambridge, University Press
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectdiptera
