Quarterly journal of microscopical science . irv Longitudinal section of pleural appendage >>f abdomen. Thetracheae (//•). muscles [m), fat-body {fb), and cells oi haemolymph (rli) are visible. Zeiss, ob. DU. c 0. teguments comme on en voil chez les larves de Dytiscides (loc. p. 259). This conclusion of Portiers is not precise, at leasl in th<of the larvae of H. caraboides, as the latter have ninepairs of lateral spiracles, two of which are on the thorax andBeven on the abdomen. The spiracles have an oval external outline, the latter showingtwo smaller ovals ea
Quarterly journal of microscopical science . irv Longitudinal section of pleural appendage >>f abdomen. Thetracheae (//•). muscles [m), fat-body {fb), and cells oi haemolymph (rli) are visible. Zeiss, ob. DU. c 0. teguments comme on en voil chez les larves de Dytiscides (loc. p. 259). This conclusion of Portiers is not precise, at leasl in th<of the larvae of H. caraboides, as the latter have ninepairs of lateral spiracles, two of which are on the thorax andBeven on the abdomen. The spiracles have an oval external outline, the latter showingtwo smaller ovals each other. The Bpiracleeare located on the tops of conical evaginations of the integu-ment, which in these places are covered with dark-brownchitin. These evaginations are Bituated on the Bides of the bodyin the part of the pleural appendages of the larva Text-fig. ). From the spiracles the initial narrow trunks oi the ustart as a aorl of \ estibulum. They are thick-walled and set inside with a dense brush of Text-fig. Transverse section of lateral wall of abdomen of larva of firststage through a closed spiracle (stf). trh tracheae. Zeiss,ob. DD, oc. 4. Text-fig. 16.
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Keywords: ., bookcentury1800, bookdecade1850, bookpublisheroxfor, bookyear1853
