ANALYTICAL INDEX 



453 



On the Law which has regu- 

 lated the Introduction of New 

 Series, A. R. Wallace, 194. 



On the Reception of the Origin 

 of Species, T. H. Huxley, 196. 



On the Secular Cooling of the 

 Earth, Lord Kelvin, 4 n. 3. 



On the Tendency of Varieties 

 to depart indefinitely from the 

 Original Type, A. R. Wallace, 194. 



On the Variations of the 

 Evening Primrose, G. A. 

 Boulenger, F.R.S., xix n. 5 : see also 

 xxi. 



On Variation, see Materials for 

 the Study of Variation, W. 

 Bateson. 



Open country in S. Africa, defini- 

 tion of, 340. 



Ophiuroids in early Palaeozoic, 30. 



Orchidaceae, self-fertilization of 

 many, 92. 



Orchis Bee, self-fertilization of, 64, 



Orders of insects, mimicry between 

 different, 229-31, 250-61. 



Organs, origin of, ic8, 109. 



Oriental and other Lepido- 

 ptera Illustrating Mimicry, 

 X. 370-6. 



Oriental Region : see also Anda- 

 man, 373, 373 n. 2 ; Borneo, 257 n. 1, 

 275, 276, 348, 349, 353, 367 n. 2, 

 369 ; Burma, 286-92, 373 ; Bombay, 

 70 n. 2 ; Canara, 70 n. 2 ; Ceylon, 

 70-1,285, 286, 349; China,S., 88,333; 

 Deccan, 70 n. 2 ; Hambantotte, 

 70 n. 2 ; Hong-Kong, 88; India, 70, 

 70 n. 2, 269, 317, 324, 34i, 342, 

 349, 363, 371-3, 376; Irravvaddy, 

 291 n. 1 ; Kala Pani, 285 ; Kandy, 

 285 ; Karachi 70, 70 n. 2 ; Khan- 

 dalla, 70 n. 2; Macao, 88; Mala- 

 bar, 178, 187 ; Malaya, 248, 252, 

 333> 367 ; Mandalay, 291 n. I ; 

 Mogok, 291 n. 1 ; Moulmein, 289; 

 North Kanara, 341 ; Pahpoon, 290; 

 Poona, 70 n. 2 ; Puttalam, 70 n. 2 ; 

 Salween, 289; Siam, 303, 341; 

 Sikkim, 373 ; Singapore, 368 ; Sinza- 

 way, 290 ; Taungyah, 287 ; Tenas- 

 serim, 290, 291, 291 n. 1 ; Tha- 

 beitkyin, 291 n. 1 ; Thundiani, 285 ; 

 Trincomalie, 70 n. 2 ; Wabosakhan, 

 288 ; Yoonzaleen, 290. 



— The study of mimicry in relation 

 to, xxvi ; fading in the pigments of 



certain museum specimens of Lepi- 

 doptera from, xlv ; A. R. Wallace on 

 mimicry in the, 222 ; F. Moore on 

 mimicry in the, 223 ; uniformity in 

 Euploei7ii of, 277, 333, 334 ; « leaf- 

 butterflies ' (Kallima) of, 203-8, 302, 

 310; Euploeini nearly restricted to 

 Australian and, 333 ; Precis, seasonal 

 forms of almana of, 340, 341 ; 

 mimicry in the Elymniinae of, 353 ; 

 L. chrysippus in, 70, 364 ; mimetic 

 chafer of, 368 ; blue Euploeas of the, 

 roughly mimicked by diurnal Chal- 

 cosiine moths, 372, 376 ; examples of 

 mimicry chiefly selected from Lepi- 

 doptera of, 370-6; localities of 

 A. cama in 382. 



Origin of Species, Charles 

 Darwin, xv, xviii, xix, xxii, xxvi, 5, 

 21, 25, 46, 47, 48, 57, 58, 63, 67, 84, 



9i» 94, 139, 162, 165, 175, 175 n. 1, 

 196, 199, 200, 201, 219, 233 n. 1, 

 361, 379; arguments for pre- 

 Cambrian time in, 5 ; definition of 

 species in, 46, 47 ; penetration of 

 ideas of, 48 ; influence on Huxley of, 

 200-1 ; twofold aim of, 200, 201. 



Origin of the Fittest, Professor 

 E. D. Cope, 109. 



Origin of Pupal Groove in 

 Pierinae, &c, V. 147-50. 



Origin of specific discontinuity, xv, 

 xvi ; importance of geographical 

 distribution for the study of, xvi ; 

 of organs and limbs, 108, 109; of 

 Mullerian mimicry from warning 

 colours, 329-31, 349 ; of mimicry, 

 examples bearing on, 376. 



Orioles, mimicry of powerful birds 

 by, 367- 



orise, Dismorphia, perfect mimicry 

 of Ithomiinae by, 240, 265, 266 ; me- 

 thod of attaining transparency by, 

 266 ; Ecuador form of model and 

 mimic, 265, 266. 



orithyia, Jitnonia {Precis), wing of, 

 in nest of Microliter ax, 291. 



Ornithorhynchus, Song of the, 

 W. J. Courthope, 103, 104. 



Orthogenesis der Schmetter- 

 linge, G. H. Eimer, 224. 



Orthoptera (see also Acridiidae, 

 Blattidae, Locttstidae, Mantidae, 

 Phasmidae) : of Commentry Car- 

 boniferous, 35-7 ; great age of, 52 ; 

 mimicking ants, 256, 257, 257 n. 1, 

 258 (Fig. 5), 280; mimicry of leaf- 



