. The natural history of the farm; a guide to the practical study of the sources of our living in wild nature. Natural history. THE FARM STREAM 39 be seen without a lens and too num- erous even to be mentioned here. The water is like another world of life, containing a few forms that are directly useful to. Fig. 21. Adult aquatic insects: a. the back-swimmer diving- US and many more l^°!°"f''!']i *• the water-boatman (CorMio) •^ beetle {DyUscus); d, a giant water-bug (Benacus). that furnish for- age for these; containing a few that are noxious when adults, such as black-flies, horse-flies
. The natural history of the farm; a guide to the practical study of the sources of our living in wild nature. Natural history. THE FARM STREAM 39 be seen without a lens and too num- erous even to be mentioned here. The water is like another world of life, containing a few forms that are directly useful to. Fig. 21. Adult aquatic insects: a. the back-swimmer diving- US and many more l^°!°"f''!']i *• the water-boatman (CorMio) •^ beetle {DyUscus); d, a giant water-bug (Benacus). that furnish for- age for these; containing a few that are noxious when adults, such as black-flies, horse-flies and mosquitoes, and a host of other forms, all of interest to the naturalist, but not known to be of practical importance. They are all a part of the native population of the stream, and each has a share in carrying on its natural social functions. In the water as on land, green plants represent the great producing class, while animals and parasitic plants are the con- sumers. And among the animals there are herbivores and carnivores, parasites and scavengers. One who but casu- ally examines the animal life of the stream is apt to see chiefly carnivorous forms; for these are most i n evidence: Fig. 22. Aquatic insect larvae: a, a diving-beetle, and here, aS ClSC- Coptotomus (aitev Helen Williamson Lyman); &, a i i_ !_• dobson larva, or hellgrammite, Corydalis cornuta (after wncre, nei DlVOreS, Lintner); can orl-fiy larva, Sialis (after Maude H. i ; _ i Anthony). Dcing poorly. 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 Needham, James G. (James George), 1868-1956. Ithaca, N. Y. , The Comstock Publishing Company
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectnaturalhistory, booky
