. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 58 WALTER N. HESS. larvae require a soft-bodied animal into which they can pierce their mandibles and inject the poisonous secretion. These results, while giving no definite data as to the exact food of these larvae, lead one to conclude that they probably eat any soft-bodied insect larva, mollusca or annelid, that they happen to find in their nocturnal wanderings. Snails are probably one of their chief foods, and though these animals are not supposed to be very abundant, they were found abundantly at night in the damp regio
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 58 WALTER N. HESS. larvae require a soft-bodied animal into which they can pierce their mandibles and inject the poisonous secretion. These results, while giving no definite data as to the exact food of these larvae, lead one to conclude that they probably eat any soft-bodied insect larva, mollusca or annelid, that they happen to find in their nocturnal wanderings. Snails are probably one of their chief foods, and though these animals are not supposed to be very abundant, they were found abundantly at night in the damp regions where these larvae live. Cutworm larvae were also abundant. Earthworms, except very small ones, were not eaten until they had been with the larvae for a considerable length of time, while other food was eaten very readily. This would seem to indicate that probably snails and small insect larvae, expe- cially cutworms, are their natural foods. Among the larvae of many members of the Lampyridas, as well as among certain other more or less widely separated groups of insects, digestion takes place entirely, or partially, outside of the body. This is accomplished by the digestive juices being exuded from the mouth upon the food which is later eaten by the larvae in a more or less completely digested condition. 'It is characteristic of most insects that feed in this way to have. FIG. 9. Photurus pennsylvanica larva, labrum, dorsal view. very small heads, so that the mouth is not sufficiently large to take in only very small pieces of food. These insects, like the larvae of the Dytiscida?, are predaceous, feeding on living animal food. The nature of this food is such that it could not be easily. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological L
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
