. The microscope and its revelations. es in length, and in most butterflies andmoths it is about as long as the body itself; in A-ni-])/to), one of theSphinyidce, it is more than nine inches long, or about three times thelength of the body. This haustellum, which, when not in use. iscoiled up in a spiral beneath the mouth, is an extremely beautifulmicroscopic object, owing to the peculiar banded arrangement it ex-hibits (fig. 740), which is probably due to the disposition of its many instances the two halves may be seen to be locked togetherby a set of hooked teeth, which are i
. The microscope and its revelations. es in length, and in most butterflies andmoths it is about as long as the body itself; in A-ni-])/to), one of theSphinyidce, it is more than nine inches long, or about three times thelength of the body. This haustellum, which, when not in use. iscoiled up in a spiral beneath the mouth, is an extremely beautifulmicroscopic object, owing to the peculiar banded arrangement it ex-hibits (fig. 740), which is probably due to the disposition of its many instances the two halves may be seen to be locked togetherby a set of hooked teeth, which are inserted into little depressionsbetween the teeth of the opposite side. Each half, moreover, mavlie ascertained to contain a trachea or air-tube, and it is probable,from the observations of Mr. Newport, that the sucking up of thejuices of a flower through the proboscis (which is accomplished withgreal rapidity) is effected by the agency of the respiratory proboscis of many butterflies is furnished, for some distance from. FIG. 740.—Haustellum (proboscis) of Vanessa. PAETS OF THE BODY 993 its extremity, with a double row of small projecting barrel-shaped1 ><lies (shown in fig. 740), which are surmised by Mr. Newport(whose opinion is confirmed by the kindred inquiries of Dr. Hicks)to be organs of taste. Numerous other modifications of the structureof the mouth, existing in the different tribes of insects, are wellworthy of the careful study of the microscopist; but as detaileddescriptions of most of these will be found in every systematic trea-tise on entomology, the foregoing general account of the principaltypes must suffice. Parts of the Body.—The conformation of the several divisions ofthe alimentary canal presents such a multitude of diversities, notonly in different tribes of insects, but in different states of the sameindividual, that it would be utterly vain to attempt here to giveeven a general idea of it, more especially as it is a subject of farl
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectmicrosc, bookyear1901
