. An introduction to zoology, with directions for practical work (invertebrates). Fig. 226.^-LibeUida depressa. n, Node of the wing. The larvae of these Dragon-flies are usually to be found in very dirty stagnant water. Genus 1. Llbellllla.—Abroad-bodied form, witb a dark triangular stain at the base of the hind wings; the abdomen is not spotted dorsally and it is thicker in the middle, so that its sides are not parallel. In L. depressa (Fig. 226) the body is blue in the male and brown in the female; in L. quadrimaculata, a very common species, there is a dark spot at the node of each wing as
. An introduction to zoology, with directions for practical work (invertebrates). Fig. 226.^-LibeUida depressa. n, Node of the wing. The larvae of these Dragon-flies are usually to be found in very dirty stagnant water. Genus 1. Llbellllla.—Abroad-bodied form, witb a dark triangular stain at the base of the hind wings; the abdomen is not spotted dorsally and it is thicker in the middle, so that its sides are not parallel. In L. depressa (Fig. 226) the body is blue in the male and brown in the female; in L. quadrimaculata, a very common species, there is a dark spot at the node of each wing as well as at its apex, and both sexes are brown. Genus 2. Sympetrum. — Smaller forms than Libellula, with narrower abdomen, and wings without the dark tri- angular stain at the base, though, a yellowish stain may be present. The male, except in the black species, S. scoticum, is marked with brilliant red pigment which is absent in the Fig. 227.—Nymph of Libellula. The line to the left shows the actual 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 Lulham, Rosalie Blanche Jermaine. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
