. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. Fig. 24.—Necrophorus (from Landois) r. The two rasps. Left-hand figure, part of the rasp highly magnified. segment, each rasp being crossed, as described by Lan- dois,69 by from 126 to 140 fine ribs. These ribs are scraped by the posterior margins of the elytra, a small portion of which projects beyond the general outline. In many Crioceridse, and in Clythra punctata (one of the Chrysomelidte), and in some Tenebrionidaa,
. The descent of man, and selection in relation to sex. Evolution (Biology); Sexual selection in animals; Sexual dimorphism (Animals); Sex differences; Human beings -- Origin. Fig. 24.—Necrophorus (from Landois) r. The two rasps. Left-hand figure, part of the rasp highly magnified. segment, each rasp being crossed, as described by Lan- dois,69 by from 126 to 140 fine ribs. These ribs are scraped by the posterior margins of the elytra, a small portion of which projects beyond the general outline. In many Crioceridse, and in Clythra punctata (one of the Chrysomelidte), and in some Tenebrionidaa, etc.,70 the rasp «9 'Zeitschrift fur wiss. Zoolog.' B. xvii. 1867, s. 127. 701 am greatly indebted to Mr. G. R. Crotch for having sent me nu- merous prepared specimens of various beetles belonging to these three families and others, as well as for valuable information of all kinds. He believes that the power of stridulation in the Clythra has not been pre- viously observed. I am also much indebted to Mr. E. W. Janson, for information and specimens. I may add that my son, Mr. F. Darwin, finds. 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 Darwin, Charles, 1809-1882. New York, D. Appleton and company
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectevoluti, bookyear1872
