Archive image from page 344 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 C'llAl'. X.] IX SECTS. 333 these organfi for burrowing in sand-bank-s and making tiicir nesU. Tlie tar«i of the front-legs arc dilateroa«l cuhIuouh of liairs; and in many genera of water-beetles they are armed with a round tlat KUcker, so that the male may adhere to tho Hli|)|>ery Ixwly of the fniale. it !-> amueh more uiuisual cir- ( UMiHtanc'C that the fc-inaies of .-Mme water-lxxtles (Dyti-t ufij have their elytra deeply grooved, and in Ac H


Archive image from page 344 of The descent of man and. The descent of man and selection in relation to sex descentofmansele001darw Year: 1909 C'llAl'. X.] IX SECTS. 333 these organfi for burrowing in sand-bank-s and making tiicir nesU. Tlie tar«i of the front-legs arc dilateroa«l cuhIuouh of liairs; and in many genera of water-beetles they are armed with a round tlat KUcker, so that the male may adhere to tho Hli|)|>ery Ixwly of the fniale. it !-> amueh more uiuisual cir- ( UMiHtanc'C that the fc-inaies of .-Mme water-lxxtles (Dyti-t ufij have their elytra deeply grooved, and in Ac Hi us aui- ra/iiJt thickly set with hairn, as an aid to the male. The females of some other watc r- Ix'etles (nydro|>oniH) have their elytra punctured for the -anir »bjfet. In the male f f 'nihro rrif/rariuji (fiir. h) it in the tibia whieh i dilate«l into a broa! horny plnte, with mi- nute membranei)us dntx, giv- ing to it a singular ap|M ar. like that of a riddle/ In tl» > mall tif IVnthe (a genus « ' !• I a few of the middh joints (f the a dilahil and fumi<«)i«'4l on the infi-rinr •< with • of hair, exactly like thtHH. on tlie tarm oi tho Cai .ii i We ha0 brre a ntrioac ftiMj ahW e—0 ot dti—tpiibi. far of Ihr r««MlM of ftNir BMUIMAtt »(NaM« oC DjTtlPCWi, uA of CVfUki


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