. Biological series. Biology. Pig. 8.—Head of Cynipid larva showing external openings Fig. 9.—Longitudinal section of the larva of the salivary glands just below the mouth. of Philonix nigra Gillette, passing through a salivary gland and Its associated duct. Concerning the feeding habits of the larvae of the Cynipidae, we can state positively that the cell contents alone furnish the nourishment and that these are withdrawn from the cells without destroying the walls. An enzyme secreted by the salivary glands of the larva partially pre- digests this food. This ferment must act through the *cell
. Biological series. Biology. Pig. 8.—Head of Cynipid larva showing external openings Fig. 9.—Longitudinal section of the larva of the salivary glands just below the mouth. of Philonix nigra Gillette, passing through a salivary gland and Its associated duct. Concerning the feeding habits of the larvae of the Cynipidae, we can state positively that the cell contents alone furnish the nourishment and that these are withdrawn from the cells without destroying the walls. An enzyme secreted by the salivary glands of the larva partially pre- digests this food. This ferment must act through the *cell membrane • I have found that the froth on plants in which the " Spittle Insects " of the Family Cercopidae develop, also contains an enzyme that rapidly changes starch to sugar. Experiments by Miss J. McFarlane that are not yet fully completed seem to indicate a larger amount of sugar in the stems surrounded by the froth than in corresponding parts of unaffected 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 University of Toronto; Toronto, Ont. University. University of Toronto studies. Biological series. Toronto University Press [etc. ]
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectbiology, bookyear1898
