NOTES TO CHAPTER 9.

9/1. "Souvenirs entomologiques," 8th series, chapter 21.

9/2. "Les Ravageurs," chapter 34, agriculture.

9/3. "Souvenirs entomologiques," 10th series, chapter 12.

9/4. Id., 1st series, chapter 2, and 10th series, chapter 13.

9/5. Id., 2nd series, chapter 17.

9/6. Id., 7th series, chapter 20.

9/7. Id., 2nd series, chapter 4.

9/8. At novitas mundi nec frigora dura ciebat,

Nec nimios aestus.

Lucretius, "De Natura rerum."

9/9. In this connection see the excellent introduction written by M. Edmond Perrier to serve as preface to the work of M. de Romanes: "l'Intelligence des animaux."

9/10. "Souvenirs entomologiques," 8th series, chapter 20.

9/11. To Henry Devillario, 30th March, 1883.

9/12. To Henry Devillario, 12th May, 1883.

9/13. To his brother, 1900.

9/14. Letters to his brother.

"I am not sulking; far from it...I have no lack of ink and paper; I am too careful of them to lack them; but I do lack time...So you still think I am sulking because I do not reply! But imagine, my dear and petulant brother, that for several weeks I have been pursuing, with unequalled persistence, some abominable conic problems proposed at the fellowship examination, and once I have mounted my hobby-horse, good-bye to letters, good-bye to replies, goodbye to everything." (Carpentras, 27th November, 1848.)

"You are right, seven times right to storm at me, to grumble at my silence, and I admit, in all contrition, that I am the worst correspondent you could find. To force myself to write a letter is to place myself on the rack, as well you know...But why do you get it into your head, why do you tell me, that I disdain you, that I forget you, that I ignore you, you, my best friend?...For my silence blame only the multiplicity of tasks, which often surpasses, not my courage, but my strength and my time." (Ajaccio, 1st June, 1851.)

9/15. "Souvenirs entomologiques," 10th series, chapter 8.

9/16. Id., 9th series, chapter 2.