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Show 1868.] ON THE AMERICAN RALLID.E. 467 This Coot is readily distinguishable among the white-rumped species by its large dimensions, and in particular by the great size of the legs and toes, especially the length of the middle toe, which (taken with that of the nail) usually exceeds four inches. In Fulica leucopyga and F. leucoptera the corresponding length of the middle toe and tail is barely 3*5. F. frontata, Gray, MS., is, as far as we can decide from examination of the single example in the British Museum, merely a specimen of this species with the frontal shield very much developed. Fig. 8 represents the head-shield of this bird. 5. FULICA LEUCOPYGA. Fulica leucopyga, Licht. in Mus. Berol. ; Hartl. J. f. O. 1853, Extra-H. p. 84 ; Schlegel, M. des P.-B. Ralli, p. 64. Fulica rufifrons, Landbeck, Wiegm. Arch. 1862, p. 223. Fulica chloropoides, King, Zool. Journ. iv. p. 95 (?). Fig. 9. Fulica leucopyga. Obscure ardesiaca, capite undique nigricante : crisso albo, plumis quibusdam medialibus nigris: remigis externi margine concolori neque albo : rostri apice flavo, basi cum scuto frontali ruberrimis hoc angusto, supra acute angulato : pedibus olivaceis : long, tota 16*0, alee 6*8, caudce 2*4, rostri a rictu 1 *3, tarsi 3*2, dig. med. cum ungue 3*5. , • Hab. Uruguay (Sello); Chili (Landb.); Patagonia (King); Falkland Islands (Mus. Brit.). Mus. Brit., Derb. |