. The Journal of hygiene . ion which we have here, following Brauer, described aspost-scuteilum is by Theobald (1901) called the metathorax. It is animportant region, as the presence or absence of hairs and scales on itis a matter of generic importance. In Anopheles maculipennis it is,as Theobald says, nude. According to Brauer all these dorsal pieces are part of the meso-thorax; the prothorax is confined to the anterior surface of the thoracicpyramid and does not appear on the upper surface at all (Figs. A and15, PI. IX.). The metathorax is similarly almost squeezed out dorsallybetween the po
. The Journal of hygiene . ion which we have here, following Brauer, described aspost-scuteilum is by Theobald (1901) called the metathorax. It is animportant region, as the presence or absence of hairs and scales on itis a matter of generic importance. In Anopheles maculipennis it is,as Theobald says, nude. According to Brauer all these dorsal pieces are part of the meso-thorax; the prothorax is confined to the anterior surface of the thoracicpyramid and does not appear on the upper surface at all (Figs. A and15, PI. IX.). The metathorax is similarly almost squeezed out dorsallybetween the post-scutellum and the first abdominal segment, andappears only laterally and ventrally. There appears to be a trace of themetanotum or dorsal portion of the metathorax, forming a very narrowband between the post-scutellum and the first abdominal tergum. Ventrally the neck passes into the thorax, and its transparentintegument is extended on to the median area of the prothorax. This 470 The Stnwtnre and Biolocjij of Anopheles. ■5 jn M P* « i; 0 •1^ ■a c3 S e 2 s tS •^ c cS S a, o S ^ G. H. F. NUTTALL AND A. E. SlIIPLEY 471 is very manifest when the female mosquito is sucking blood, a brightred bead appearing here and contrasting with the otherwise sombrehue of the thorax. This area is bounded posteriorly by the origin ofthe prothoracic or first pair of legs, and laterally by a pair of platesbearing a pair of sausage-shaped organs called the patagia (v. p. 477).Between each patagium and the origin of the leg is a small prominencebearing particularly large hairs. The same plate of exoskeleton whichbears the patagium extends along the side of the body almost as faras the anterior border of the first or mesothoracic spiracle. Thistogether with another piece is figured and described by Christophers(March, 1901, plate I.) as the pleuron of the mesothorax. We regardit as prothoracic and have so shaded it. Sharp (1895, p. 446) indeedregards the first spiracle of the Diptera as pr
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, bookyear1901
