. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. ORTHOPTERA. 281 "successful musician caresses -with his antennae the mate he has ";^^ Dr. Scudder was able to excite one of these insects to answer him by rubbing on a file with a quill.®- In both sexes a re- markable auditory apparatus has been discovered by Von Siebold, situated in the front legs.^^ In the three Families the sounds are differently produced. In the males of the Achetidae both wing-covers have the same ap- paratus; and this in the field-cricket (Gry
. The descent of man : and selection in relation to sex. Evolution; Natural selection; Heredity; Human beings. ORTHOPTERA. 281 "successful musician caresses -with his antennae the mate he has ";^^ Dr. Scudder was able to excite one of these insects to answer him by rubbing on a file with a quill.®- In both sexes a re- markable auditory apparatus has been discovered by Von Siebold, situated in the front legs.^^ In the three Families the sounds are differently produced. In the males of the Achetidae both wing-covers have the same ap- paratus; and this in the field-cricket (Gryllus campestris, fig. 11) consists, as described by Landois,^* of from 131 to 138 sharp, trans- verse ridges or teeth (st) on the under side of one of the nervures. 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 : Merrill and Baker
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Keywords: ., bookcentury1800, bookdecade1870, booksubjecthumanbeings, bookyear
