. Clé d'oiseaux de l'Amérique du Nord. Contenant des indications succinctes sur chaque espèce d'oiseau vivant et fossile connu à l'heure actuelle du continent au nord de la frontière du Mexique et des États-Unis, y compris le Groenland et Basse Californie, avec qui sont intégrées d'ornithologie générale : un aperçu de la structure et la classification des oiseaux ; et de l'ornithologie de terrain, un manuel de la collecte, la préparation et la conservation des oiseaux. Les oiseaux ; oiseaux ; 1887. 58 Field Ornithology. concernant utilisation abondante de la substance à l'origine. S'il est vrai, comme certains l'état, que les insectes peuvent manger l'arsenic sans mourir, c'est aussi tru

• Contributeur: The Book Worm / Alamy Banque D'Images
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. Key to North American birds. Containing a concise account of every species of living and fossil bird at present known from the continent north of the Mexican and United States boundary, inclusive of Greenland and lower California, with which are incorporated General ornithology: an outline of the structure and classification of birds; and Field ornithology, a manual of collecting, preparing, and preserving birds. Birds; Birds; 1887. 58 FIELD ORNITHOLOGY. respecting lavish use of the substance at the outset. If it be true, as some state, that bugs can eat arsenic without dying, it is also true tliat they do not relish it; and in entering a case of skins they will bun'ow by preference in those holding the least of it. This fact is continually exhibited in large collections, where if two birds be side by side, one being duly arsenicized and the other not so, one will be taken and the other left. My second item, with its proper deduction, will form, I think, a fitting conclusion to tliis treatise. It is a fact in the natural history of these our pests, that they are fond of peace and quiet, —they do not like to be dis- turbed at their meals. So they rarely effect permanent lodgment in a collection that is con- stantly handled, though the doors stand open for hours daily. As a consequence, the degree of (iur diligence in studying birdskins is likely to become the measure of our success in pre- serving them. I once read a work, by an eminent and leai-ned divine, on the " Moral Uses of Dark Things, " under which head the author included everything from earthquakes to mos- quitoes. If there be a moral use in the " dark thing " that museum pests certainly are to us, we have it here. The vei'y bugs urge on our work.. Fig. 13. — Wilson's School-house, nkae Gkat's Fehky, Phil.vi)i:lphia. From .i Jrawlng by M. S. Weaver, Oct. 22, 1841, received by Elliott Coues, February, 1879, from Malviria Lawson, dangbter of Alexander Lawson, Wilson's engraver. See ar

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