. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DEAGON-FLIES. 259 Dragon-flies (Odonata). The Dragon-flies are all carnivorous, feeding off butterflies and moths when adult, and upon various water insects when in the larval stage. The adults have large eyes, these often occupy- ing the greater part of the head. They are provided with very. Fro. 134.—Dkaoon-flies. A, A Draf;on-fly (^Esckna grandis), partly dissected ; b Li^ellula depressa, h, He-id ; t to t", thoracic segments ; e, e, eyes ; m, jaws ; /, upper lip. (Nicholson.) Inrva , c, impa; n, head of a
. A text-book of agricultural zoology. Zoology, Agricultural; Zoology, Economic. DEAGON-FLIES. 259 Dragon-flies (Odonata). The Dragon-flies are all carnivorous, feeding off butterflies and moths when adult, and upon various water insects when in the larval stage. The adults have large eyes, these often occupy- ing the greater part of the head. They are provided with very. Fro. 134.—Dkaoon-flies. A, A Draf;on-fly (^Esckna grandis), partly dissected ; b Li^ellula depressa, h, He-id ; t to t", thoracic segments ; e, e, eyes ; m, jaws ; /, upper lip. (Nicholson.) Inrva , c, impa; n, head of a, abdomen ; an, antennte ; powerful mouths. Their wings are usually transjiarent, and have a number of mesh-like veins. The legs have a series of spines upon them. Dragon - flies are most useful as insect destroyers. Each individual seems to have a hunting-ground. 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 Theobald, Frederick Vincent, 1868-1930. Edinburgh and London, W. Blackwood and Sons
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectzoology, bookyear1899
