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Show 1877.] MR. D. G. ELLIOT ON THE IBIDIN.E. 483 (1877) Graptocephalus, Elliot, gen. nov Geronticus davisoni,H.umo. (1877) Thaumatibis, Elliot, gen. nov Bis gigantea, Oustalet. (1877) Lampribis, Elliot, gen. nov Ibis olivacea, D u Bus. KEY TO THE GENEEA. A. Head, and neck for nearly its entire length naked. a. Skull oblong on top; webs of scapulars decomposed ; tarsi and middle toe equal 1. Ibis. b. Skull square on top, middle toe three fourths the length of tarsus 2. Thaumatibis-. B. Head and upper part of neck naked. a. Skull square on top; occiput sloping to forehead, which descends rapidly to maxilla. Tarsus half an inch longer than middle toe 3. Graptocephalus. b. Skull oblong on top. «'. Base of neck covered with stiffened spiny shafts ... 4. Carphibis. b'. Back of head covered with papilhe 5. Inocotis. 0. Head and throat naked; occiput projecting beyond the line of the neck; neck feathered behind nearly to the head. a. Neck covered with loose, extremely narrow, lengthened and pointed feathers; tail long, rounded 6. Comatibis. b. Neck covered with soft short feathers; tail long,square 7. Geronticus. D. Front and sides of head, and throat, naked 8. Phitnosus. E. Fore part of head on top and face naked; throat feathered 9. Nipponia. F. Top of head feathered. a. Sides of head and throat naked; tail very long, cuneate 10. Cercibis. b. Space around the eye and line on sides of throat naked 11. Theristicus. c. Space around the eye bare; throat covered with long feathers; head crested 12. Lophotibis. d. Space between the eye and maxilla bare; a naked line on throat along the lower margin of mandible 13. Hagedashia. G. Head and throat feathered. rt. Bare wattle pendent from the throat 14. Bostrychia. b. Narrow line on forehead at base of culmen and space between the eye and maxilla bare 15. Harpiprion. c. Space between eye and maxilla bare. rt'. Feathers of the neck long and loose; thighs feathered nearly to the knee 16. Molybdophanes. b'. Feathers of the neck short; thighs bare for nearly their entire length 17. Falcinellus. H. Forehead and space around and behind the eye naked. a. Throat feathered 18. Lampribis. b. Throatnaked 19. Eudocimus. GEOGRAPHICAL DISTRIBUTION. The birds composing the subfamily of which this Monograph treats are distributed everywhere throughout the globe, being found in every zoogeographical division yet named ; and if the number of species of a family which exists in any particular portion of the earth is an indication that it there had its origin, then we may consider that Ibis appeared first in the eastern hemisphere; for, of the twenty-five species recognized in this paper, fifteen are found to dwell uoon the eastern continents, or on the islands composing the Indian v 31* |