( 607 ) XXV. Bionomic Notes on Bidtcrflies. By G. B. Longstaff, M.A., M.D./F.E.S. [Read October 7th, 1908.] PAGE Introductory 607 § 1. Scents 608 § 2. The coloured juice exuded by certain Lepidoptera. 622 I 3. The tenacity of life of protected species . . 624 § 4. Butterflies bearing marks of the attacks of foes 627 § 5. Experimental evidence as to the palatability of Butterflies 629 § 6. Mimics in the field deceiving man .... 631 I 7. Notes on the Flight of sundry Butterflies . . 635 § 8. The selection by yellow Butterflies of yellow leaves as resting-places 640 § 9. Heliotropism 643 § 10. "List" and Shadow 647 § 11. The inverted attitude of Lyc^nids and some other Butterflies 655 § 12. The rest-attitudes op certain Neotropical and Oriental Hesperids 660 § 13. Seasonal Dimorphism in Neotropical Butterflies . 662 Introductory. When travelling in a country new to him it is almost inevitable that an entomologist's time should be chiefly taken up Avith searching for insects and securing speci-mens — his temptation is to become " a mere collector." Further, such observations of more scientific value as he finds time to make are but too apt to be isolated, imper-fect and inconclusive. Yet something may be done even during a flying visit, and a judicious arrangement of the notes made may provide useful material for further work by the same naturalist, or by a more capable or more fortunately circumstanced observer, following his footsteps.. But it may be objected to such a paper as this, that it is made up of trivial details, that it is loaded with weari-some repetitions, that everybody has long been familiar with the facts brought forward — in short, that it is but a laborious "demonstration of the obvious."* So be it. For the sake of argument these propositions might all be admitted, and yet the time spent in writing the paper, and * W. Bateson, F.R.S., Report of British Association, 1904, p. 577. TRANS. ENT. SOC. LOND. 1908. — PART IV. (JAN. 1909)
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