[Footnote 80: A beautiful drawing of this rare insect, Hymenopus bicornis (in the nymph or active pupa state), was kindly sent me by Mr. Wood-Mason, Curator of the Indian Museum at Calcutta. A species, very similar to it, inhabits Java, where it is said to resemble a pink orchid. Other Mantidae, of the genus Gongylus, have the anterior part of the thorax dilated and coloured either white, pink, or purple; and they so closely resemble flowers that, according to Mr. Wood-Mason, one of them, having a bright violet-blue prothoracic shield, was found in Pegu by a botanist, and was for a moment mistaken by him for a flower. See _Proc. Ent. Soc. Lond._, 1878, p. liii.] [Footnote 81: C. Dixon, in Seebohm's _History of British Birds_, vol. ii. Introduction, p. xxvi. Many of the other examples here cited are taken from the same valuable work.] [Footnote 82: See A.H.S. Lucas, in _Proceedings of Royal Society of Victoria_, 1887, p. 56.] [Footnote 83: Professor Wm.H. Brewer of Yale College has shown that the white marks or the spots of domesticated animals are rarely symmetrical, but have a tendency to appear more frequently on the left side. This is the case with horses, cattle, dogs, and swine. Among wild animals the skunk varies considerably in the amount of white on the body, and this too was found to be usually greatest on the left side. A close examination of numerous striped or spotted species, as tigers, leopards, jaguars, zebras, etc., showed that the bilateral symmetry was not exact, although the general effect of the two sides was the same. This is precisely what we should expect if the symmetry is not the result of a general law of the organisation, but has been, in part at least, produced and preserved for the useful purpose of recognition by the animal's fellows of the same species, and especially by the sexes and the young. See _Proc. of the Am. Ass. for Advancement of Science_, vol. xxx. p. 246.] [Footnote 84: _Descent of Man_, p. 542.]