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Index. 



T. 



TADPOLES, arrested development, 

 607. 



Tegetmeier, W. B., metamorphosis 

 of Siredon, 566. 



Teleology and Mechanism, 694. 



Terebrantia, larvae, 508. 



Transformation, causes of, 460, 

 496 ; factors of, 676. 



Trematoda, alternation of gene- 

 rations in, 83. 



Trimen, Roland ; larva of Lopho. 

 Dumolinii, 527 ; of Ch. Capensis, 

 529 ; phytophagic variability of 

 larva of Ach. Atrofios, 531. 



Triptogon roseipennis, larva, 244. 



Triton ; T. alpestris, sexual larva, 

 585 ; reproductive larvae, 590. 

 Degeneration in genus, 612. 

 Species of Upper Engadine, 631. 



Typical parts, modified by environ- 

 ment, 501, 513. 



UPPER Engadine ; Amphibia, 61 5 ; 



climate, 616 ; frog from, 618 ; 



Tritons of. 631. 

 Urea, synthesis of, 643. 



V. 



Vanessa. V. Urticv, climatic 

 variation, 60 ; V. Atalanta, Ur- 

 ticcf, and polychloros, variable 

 in two stages, 405 ; V. lo, 

 variable in one stage, 407. Con- 

 gruence and incongruence in 

 genus, 446 ; phyletic complete- 

 ness of, 447 ; arrangement of 

 spines on larvae, 448. 



Variability, origin, 107 ; limited, 

 114, 362, 653, 655 ; independent 

 in different stages, 402 ; defini- 

 tion of, 404 ; a relative term, 

 408 ; causes of, in pupae, 411 ; 

 primary and secondary, 416 ; in- 

 dependent in different larval 

 stages, 416 ; phytophagic, 305. 

 531 ; Von Hartmann's views, 



646 ; not unlimited, 647, 652, 

 655, 683; factors of, 676, 684; 

 mechanical theory of, 677 ; in- 

 dividual, 681, 685. 



Variation ; climatic, 45.686 ; causes 

 of, 105 ; analogous, 683 ; abrupt 

 not inherited, 701. 



Varieties, climatic, distinct from 

 local, 45. 



Velasco, Senor, Axolotl of L. St. 

 Isabel, 626. 



Vital force, phyletic, elimination of, 

 287 ; objections to, 352, 461, 511, 

 518 ; ontogenetic, abandonment 

 of, 641, 687. 



W. 



WALLACE, A. R ; introduction of 

 the expression " seasonal dimor- 

 phism," I ; on the dull colours 

 of female butterflies, 8 ; sexual 

 dimorphism of butterflies, 32 ; 

 local variation in colour, 60 ; 

 comparison of seasonal dimor- 

 phism with alternation of genera- 

 tions, 80 ; the bright colours of 

 caterpillars, 293 ; on adaptation, 

 589 ; on variability, 654, 658. 



Wallace, Dr., colour changes in 

 larva of B. Cynthia, 7. 



Walsh, B. D., phytophagic varia- 

 tion, 305. 



Weale, J. P. M., on the young 

 larvae of Pap. merope and Gyn. 

 fsis, 1 66 ; the larva of Ach. 

 Apropos in S. Africa, 263 ; habits 

 of S. African Sphinx-caterpillars, 

 290. 



Weir, J. Jenner, the colour varia- 

 tions of Hip. semele, 8 ; experi- 

 ments with brightly-coloured, 

 hairy, and spiny caterpillars, 336, 



Westwood, Prof. J. O., seasonal 

 dimorphism of Eph. punctaria, 

 4 ; figure of caterpillar referred 

 to, 243 ; gynandromorphic butter- 

 fly, 249. 



White colour, protection afforded 

 by, 6, 659, 66 1. 



White, Dr. F. B., local variation in 

 British Lepidoptera, 60 ; young 

 Notua larvae, -i 66. 



