Archive image from page 354 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 Caxp. X.] ORTUOPTERA. 343 won.' Dr. .cu«l»k r w:i8 alile to excite one of lhe in- Hects to answer him, l>y rubbing on a tile with a le auro- duced. In the males of the Achetifliu both win«;-covers iiave the same structure; and this in the field-cricket (Grylius carnjKstris lig. 10) couhlsts, as descrilxd by ,' of from 131 to 138 sharp, transverse ridges or teeth (at) on the under side of one of the uervures of the wing-cover. This toothed
Archive image from page 354 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 Caxp. X.] ORTUOPTERA. 343 won.' Dr. .cu«l»k r w:i8 alile to excite one of lhe in- Hects to answer him, l>y rubbing on a tile with a le auro- duced. In the males of the Achetifliu both win«;-covers iiave the same structure; and this in the field-cricket (Grylius carnjKstris lig. 10) couhlsts, as descrilxd by ,' of from 131 to 138 sharp, transverse ridges or teeth (at) on the under side of one of the uervures of the wing-cover. This toothed nervure is rapidly scrajied acrusK a projecting, smrxfth, hard nervure (r) on the U|»| surface of the opposite wing. First one wing is rublicd over the other, and then the movement is reversed, Hoth winirs are raised a little at the same time, so as to increase the resonance. In some s|Kcie« the wing-coveni of the nudim are funiished at the base with a talc-lik« plate.' I have here given a dniwing ( 11) of the teeth on the under sid«' of the ,| _nwih m nervure of another s|»ecii»s of (Jry 11 us, vir. IJ In the l«4H-uitda' flu wing-t ' 'v, iJc in- in a .d manner, ' ». ll wiii>», h acts nM the Imiw of the fiddle, llin «i\ r . r -hi RtTM a tvry i ntiM of the litroo Ian iIm) \\ r«|wooii pp. 4M. â Wr
Size: 1004px × 1993px
Photo credit: © Actep Burstov / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: 1900, 1909, archive, book, bookauthor, bookcentury, bookdecade, bookpublisher, booksubject, bookyear, darwin_charles_1809_1882, drawing, evolution, heredity, historical, history, human_beings, illustration, image, natural_selection, new_york_d_appleton_and_company, page, picture, print, reference, vintage
