. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. I.] HIND-LEGS—PROSOPIS, SPHECODES. 17 necessity of using their mouth for certain domestic purposes has limited its specialisation in this parti- cular direction. If, again, we examine the hind-legs of bees, we shall find gradations similar to those already men- tioned in the lower lip. In Prosopis (Fig. 21) they do not differ materially from those of genera which supply their young with animal food. Portions of the leg, indeed, bear stiff hairs, the original use of. Fig. 23, Fig, 2
. On British wild flowers considered in relation to insects. Flowers; Fertilization of plants by insects; Plants. I.] HIND-LEGS—PROSOPIS, SPHECODES. 17 necessity of using their mouth for certain domestic purposes has limited its specialisation in this parti- cular direction. If, again, we examine the hind-legs of bees, we shall find gradations similar to those already men- tioned in the lower lip. In Prosopis (Fig. 21) they do not differ materially from those of genera which supply their young with animal food. Portions of the leg, indeed, bear stiff hairs, the original use of. Fig. 23, Fig, 21.—Left hind-leg of Prosopis. Fig. 23.—Sphecodes. Fig. 22. — Left hind-leg of Sphecodes. Fig. 24.—Kight hind-leg of Haliclus. which, probably, was to clean these burrowing insects from particles of sand and earth, but which in Pro- sopis assist also in the collection of pollen. Fig. 22 represents the hind leg of Sphecodes (Fig. 23), a genus in which the tongue resembles in form that of Halictus. Here we see the hairs decidedly more developed, a modification which has advanced still further in Halictus (Fig. 24), in which the de- C. 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 Lubbock, John, Sir, 1834-1913. London, Macmillan and Co.
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectflowers, booksubjectp
