. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. VIl] EXTERNAL ANATOMY 55 probable that this organ is responsible for some of the charac- teristic buzzing of the mosquito. Each halter consists of a short chitinous rod arising from a basal plate and ending in a rounded knob. The concave basal plate and a knob at the base of the halter are covered with smah papillae, and Shipley and Wilson have suggested that by these two surfaces rubbing against each other when the halter vibrates, a faint note may be Fig. 28. View of under surface of
. Flies in relation to disease: bloodsucking flies. Flies; Flies as carriers of disease; Diptera. VIl] EXTERNAL ANATOMY 55 probable that this organ is responsible for some of the charac- teristic buzzing of the mosquito. Each halter consists of a short chitinous rod arising from a basal plate and ending in a rounded knob. The concave basal plate and a knob at the base of the halter are covered with smah papillae, and Shipley and Wilson have suggested that by these two surfaces rubbing against each other when the halter vibrates, a faint note may be Fig. 28. View of under surface of the base of the wing of Anopheles maculi- pennis, shewing stridulating organ. After Shipley and Wilson. A, right half of thorax with right wing. The shaded portion indicates the area which bears the stridulating organ. B, the stridulating organ, highly magnified, bl, ridged blade ; h, haltere ; kn, knob ; scl, sclerites ; ib, toothed bar. The abdomen consists of eight segments, each composed of a dorsal chitinous plate, the tergum, and a ventral chitinous plate, the sternum, between which is a soft membrane, the pleuron. On each side are six abdominal stigmata opening in segments two to seven inclusive. The surface of the abdo- men may be covered either with scales or hairs. The terminal segment is bilobed and in the male each lobe terminates in a long chitinous claw, the 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
