[489] ‘The Malay Archipelago,’ vol. ii. 1869, p. 276.
[490] ‘Entomological Magazine,’ vol. i. 1833, p. 82. See also on the conflicts of this species, Kirby and Spence, ibid. vol. iii. p. 314; and Westwood, ibid. vol. i. p. 187.
[491] Quoted from Fischer, in ‘Dict. Class. d’Hist. Nat.’ tom. x. p. 324.
[492] ‘Ann. Soc. Entomolog. France,’ 1866, as quoted in ‘Journal of Travel,’ by A. Murray, 1868, p. 135.
[493] Westwood, ‘Modern Class.’ vol. i. p. 184.
[494] Wollaston, On certain musical Curculionidæ, ‘Annals and Mag. of Nat. Hist.’ vol. vi. 1860, p. 14.
[495] ‘Zeitschrift für wiss. Zoolog.’ B. xvii. 1867, s. 127.
[496] I am greatly indebted to Mr. G. R. Crotch for having sent me numerous 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 previously 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 that Dermestes murinus stridulates, but he searched in vain for the apparatus. Scolytus has lately been described by Mr. Algen as a stridulator, in the ‘Edinburgh Monthly Magazine,’ 1869, Nov., p. 130.
[497] Schiödte, translated in ‘Annals and Mag. of Nat. Hist.’ vol. xx. 1867, p. 37.
[498] Westring has described (Kroyer, ‘Naturhist. Tidskrift,’ B. ii. 1848-49, p. 334) the stridulating organs in these two, as well as in other families. In the Carabidæ I have examined Elaphrus uliginosus and Blethisa multipunctata, sent to me by Mr. Crotch. In Blethisa the transverse ridges on the furrowed border of the abdominal segment do not come into play, as far as I could judge, in scraping the rasps on the elytra.