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Show 174 INSECTA. class of Insects. They are swathed or resemble mummies(!). Those of several Insects of this order, particularly of the Diurnre, undergo their metamorphosis in a few days; they even frequently produce two generations in the course of the year. The caterpillars or chrysalides of other~, however, remain during the winter in one of those states, and only appear as perfect Insects in the spring or summer of the following year. Genera11y speaking, the eggs laid in the fall are not hatehed till the ensuing spring. The Lepidoptera issue from their envelope in the usual manner, or through a slit which is effected on the back of the thorax. The intestine of caterpillars consists of a large tube without flexures, of which the anterior portion is sometimes slightly separated in the manner of a stomach, and the posterior forms a wrinkled cloaca; their four biliary vessels are very long and inserted very far back. In the perfect Insect, we find a first lateral stomach or crop, a second inflated or turgid stpmach, and a tolerably long small intestine, with a crecum near the cloaca(2). The larvre of the Ichneumonides and Chalcidites deliver us from a great portion of these destructive animals. We will divide this order into three families, which cor-respond to the three genera of which it is composed in the system of Linnreus. ( 1) The sheaths of the legs and antenm:e are fixed, a character peculiar to this sort of metamorphosis. (2) For the anatomy of the caterpillar, see the admirable work of Lyonet; and for the development of the organs 1n the chrysalis and butterfty, that of Herold, entitled Ilistory ofthe development of Btdterjlies, in German, Cassel and Marburg, 1815. LEPIDOPTERA. 175 FAMILY I. DIURNA. . This family( I) is the on) on . . gm of the infel;'ior wings d y e m whiCh the exterior mar-seta or kind of bridle for ~:~ ~o~ present a rigid, squamous These latter, and even most frainmg the two superior ones perpendicularly when. th I eque~t)y the former, are raised are so meti. mes terminated e b nsae ct Is a. t res t . T he antennre club, and are sometimes alm:st ~lobuhform inflation or little out or even more slender do equal thickness throughex~ re~ity. ' an form a hooked point at the This family comprises th e genus PAPILIO Lin The. Iarvre al wa h . ' . alwa s ys ave sixteen feet T The ~er~:~:~~.::~ at\ached by the t~il, ant;;' .:~~:ycsalides are almost during the day / a ways provided with a prob o~monly angular. of the wings doon y, and the colours which ortl oscts or trunk, flies not yield · ament tl superior su•·face. lD beauty to those whl'C h dleec ournadtee r thpeairrt We will divide these Inse' . . ~hose of the first have bu~ts l~to two sections. hb. ire, which are iJ'O Und ha s. mgle pair of spurs or · wmgs are raised perp d?n t elr posterior extrem't spmes to their sometimes inflated at etn Icularly when at rest Thl !• Their four truncated and he extremity globul'". elr antennre are . rounded at th ' llorm or · . fhis section includ h e summit, and someti~ ~n a little club ~~of the system ofF ~s .t .e genus PAPILio and th ~a most filiform. a riClUS. e ESPERI.lE rUriCO· F(1 ) Some ofthe N oc t urna e . or the genera of the n· xcepted. bve Catalogue of the L ~urnal I .. epidoptera, see th M. Horsfield . eptdoptet•a in theMu scum oef ftihrset Enuamstb 1e rds' ofth e De scrJ. p· n ta Company, of |